feat(setup-di-compile): restore setup-di-compile as a lean action (#239)

setup-di-compile/README.md

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+# Setup DI Compile
+
+A GitHub Action that enables all Magento modules and runs `bin/magento setup:di:compile`.
+
+The caller is responsible for checkout, PHP/composer setup, and `composer install`. This action only performs the compilation step.
+
+## Inputs
+
+| Input  | Required | Default | Description                                                        |
+| ------ | -------- | ------- | ------------------------------------------------------------------ |
+| `path` | No       | `.`     | Path to the Magento root directory. |
+
+## Usage
+
+```yml
+name: DI Compile
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  compute_matrix:
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.supported-version.outputs.matrix }}
+    steps:
+      - uses: actions/checkout@v6
+      - uses: graycoreio/github-actions-magento2/supported-version@main
+        id: supported-version
+
+  compile:
+    needs: compute_matrix
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix: ${{ fromJSON(needs.compute_matrix.outputs.matrix) }}
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: graycoreio/github-actions-magento2/setup-magento@main
+        id: setup-magento
+        with:
+          php-version: ${{ matrix.php }}
+          tools: composer:v${{ matrix.composer }}
+
+      - uses: graycoreio/github-actions-magento2/cache-magento@main
+
+      - run: composer install
+        env:
+          COMPOSER_AUTH: ${{ secrets.COMPOSER_AUTH }}
+
+      - uses: graycoreio/github-actions-magento2/setup-di-compile@main
+        with:
+          path: ${{ steps.setup-magento.outputs.path }}
+```

setup-di-compile/action.yml

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+name: "Magento compilation (setup:di:compile)"
+author: "Graycore"
+description: "A GitHub Action that runs bin/magento setup:di:compile."
+
+inputs:
+  path:
+    required: false
+    default: "."
+    description: "Path to the Magento root directory. Accepts the output of the setup-magento action."
+
+runs:
+  using: composite
+  steps:
+    - name: Enable all modules
+      working-directory: ${{ inputs.path }}
+      shell: bash
+      run: php bin/magento module:enable --all
+
+    - name: Compile
+      working-directory: ${{ inputs.path }}
+      shell: bash
+      run: php bin/magento setup:di:compile
+
+branding:
+  icon: "tool"
+  color: "orange"