Initial copy-across of some trunk parts

.github/workflows/trunk.cache.yml

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+name: Trunk Cache
+
+permissions: read-all
+
+on:
+  workflow_call:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths:
+      - .trunk/trunk.yaml
+  schedule:
+    - cron: "0 9 * * 1" # 9am Tooling Monday
+
+concurrency:
+  group: ${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  trunk-cache:
+    name: Trunk Cache
+    runs-on: ubuntu-latest
+    permissions:
+      actions: write
+    steps:
+      - name: "Setup PHP"
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.3
+      - name: "Checkout"
+        uses: actions/checkout@v4
+      - name: "Trunk Cache"
+        uses: trunk-io/trunk-action@v1
+        with:
+          check-mode: populate_cache_only

.github/workflows/trunk.check.yml

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+name: Trunk Check
+
+permissions: read-all
+
+on:
+  workflow_call:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+  schedule:
+    - cron: "0 11 * * 2" # 11am Patch Tuesday
+
+concurrency:
+  group: ${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  trunk-check:
+    name: Trunk Check Runner
+    runs-on: ubuntu-latest
+    permissions:
+      checks: write # For trunk to post annotations
+      contents: read # For repo checkout
+    steps:
+      - name: "Setup PHP"
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.3
+      - name: "Checkout"
+        uses: actions/checkout@v4
+      - name: "Trunk Check"
+        uses: trunk-io/trunk-action@v1

.github/workflows/trunk.upgrade.yml

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+name: Trunk Upgrade
+
+permissions: read-all
+
+on:
+  workflow_call:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths:
+      - .trunk/trunk.yaml
+      - .github/workflows/trunk.upgrade.yml
+  schedule:
+    - cron: "0 11 * * 1" # 11am Tooling Monday
+
+concurrency:
+  group: ${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  trunk-upgrade:
+    name: Upgrade Trunk
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write # For trunk to create PRs
+      pull-requests: write # For trunk to create PRs
+    steps:
+      - name: "Setup PHP"
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.3
+      - name: "Checkout"
+        uses: actions/checkout@v4
+      - name: "Trunk Upgrade"
+        uses: trunk-io/trunk-action/upgrade@v1
+      - name: "PR: Find Pull Request"
+        uses: juliangruber/find-pull-request-action@v1
+        id: find-pull-request
+        with:
+          labels: trunk
+      - name: "PR: Enable Pull Request Automerge"
+        continue-on-error: true
+        uses: peter-evans/enable-pull-request-automerge@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          pull-request-number: ${{ steps.find-pull-request.outputs.number }}

.trunk/.gitignore

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+*out
+*logs
+*actions
+*notifications
+*tools
+plugins
+user_trunk.yaml
+user.yaml
+tmp

.trunk/configs/.checkov.yaml

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+---
+skip-check:
+  - CKV_SECRET_* # Skip all checks that start with CKV_SECRET, we already have gitleaks doing this.

.trunk/configs/.gitleaks.toml

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+title = "Gitleaks config"
+[extend]
+useDefault = true

.trunk/configs/.hadolint.yaml

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+ignored:
+  - DL3006
+  - DL3008

.trunk/configs/.markdownlint.yaml

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+# Autoformatter friendly markdownlint config (all formatting rules disabled)
+default: true
+blank_lines: false
+bullet: false
+html: false
+indentation: false
+line_length: false
+spaces: false
+url: false
+whitespace: false

.trunk/configs/.markdownlintignore

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+LICENCE.md

.trunk/configs/.shellcheckrc

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+enable=all
+source-path=SCRIPTDIR
+
+# If you're having issues with shellcheck following source, disable the errors via:
+# disable=SC1090
+# disable=SC1091

.trunk/configs/.tflint.hcl

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+config {
+    format = "compact"
+    module = true
+    plugin_dir = "~/.tflint.d/plugins"
+}
+
+plugin "terraform" {
+    enabled = true
+    preset  = "recommended"
+}
+
+plugin "aws" {
+    enabled = true
+    version = "0.27.0"
+    source  = "github.com/terraform-linters/tflint-ruleset-aws"
+}

.trunk/configs/.trivyignore

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+AVD-DS-0001
+AVD-DS-0002

.trunk/configs/.yamllint.yaml

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+extends: relaxed
+rules:
+  quoted-strings:
+    required: only-when-needed
+    extra-allowed: ["{|*}"]
+  empty-values:
+    forbid-in-block-mappings: false
+    forbid-in-flow-mappings: false
+    ignore:
+      - .github/workflows/*.yml
+  key-duplicates: {}
+  octal-values:
+    forbid-implicit-octal: true
+  document-start: disable
+  line-length: disable

.trunk/configs/svgo.config.js

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+module.exports = {
+  plugins: [
+    {
+      name: "preset-default",
+      params: {
+        overrides: {
+          removeViewBox: false, // https://github.com/svg/svgo/issues/1128
+          sortAttrs: true,
+          removeOffCanvasPaths: true,
+        },
+      },
+    },
+  ],
+};

.trunk/trunk.yaml

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+# This file controls the behavior of Trunk: https://docs.trunk.io/cli
+# To learn more about the format of this file, see https://docs.trunk.io/reference/trunk-yaml
+version: 0.1
+cli:
+  version: 1.22.2
+# Trunk provides extensibility via plugins. (https://docs.trunk.io/plugins)
+plugins:
+  sources:
+    - id: trunk
+      ref: v1.6.0
+      uri: https://github.com/trunk-io/plugins
+# Many linters and tools depend on runtimes - configure them here. (https://docs.trunk.io/runtimes)
+runtimes:
+  enabled:
+    - go@1.21.0
+    - node@18.12.1
+    - python@3.10.8
+# This is the section where you manage your linters. (https://docs.trunk.io/check/configuration)
+lint:
+  disabled:
+    - trufflehog # Trufflehog duplicates gitleaks functionality.
+    - terrascan
+    - trivy
+  enabled:
+    - tflint@0.51.1
+    - gitleaks@8.18.4
+    - markdownlint@0.41.0
+    - taplo@0.8.1
+    - actionlint@1.7.1
+    - checkov@3.2.148
+    - git-diff-check
+    - prettier@3.3.2
+    - yamllint@1.35.1
+  definitions:
+    - name: markdownlint
+      direct_configs:
+        - .markdownlintignore
+        - .markdownlint.yaml
+actions:
+  enabled:
+    - trunk-announce
+    - trunk-check-pre-push
+    - trunk-fmt-pre-commit
+    - trunk-upgrade-available
+tools:
+  enabled:
+    - tfupdate@0.8.2
+    - gh@2.49.2
+    - jq@jq-1.7.1
+    - yq@4.44.1
+    - awscli@1.33.9
+    - action-validator@0.6.0
+    - act@0.2.63
+    - shellcheck@0.10.0
+    - hadolint@2.12.0
+    - tofu@1.7.2
+    - trunk-toolbox@0.3.2
+    - tflint@0.51.1
+    - terraform@1.1.4