perf(ci): add dependency caching across workflows

- Add Composer cache to phpstan, wpcs, and setup-wordpress action
- Add npm cache with .nvmrc reference to release workflow
- Enable Docker BuildKit for faster image builds in test-plugin

Relates to #411

Author: josephfusco

.github/actions/setup-wordpress/action.yml

@@ -23,6 +23,18 @@ runs:
       with:
         node-version: 18.x
 
+    - name: Get Composer cache directory
+      id: composer-cache
+      shell: bash
+      run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
+
+    - name: Cache Composer dependencies
+      uses: actions/cache@v4
+      with:
+        path: ${{ steps.composer-cache.outputs.dir }}
+        key: ${{ runner.os }}-composer-no-dev-${{ hashFiles('**/composer.lock') }}
+        restore-keys: ${{ runner.os }}-composer-no-dev-
+
     - name: Install dependencies
       shell: bash
       run: composer install --no-dev

.github/workflows/phpstan.yml

@@ -17,6 +17,17 @@ jobs:
         with:
           php-version: '8.2'
 
+      - name: Get Composer cache directory
+        id: composer-cache
+        run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
+
+      - name: Cache Composer dependencies
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: ${{ runner.os }}-composer-
+
       - name: Install Dependencies
         run: composer install
 

.github/workflows/release.yml

@@ -28,10 +28,11 @@ jobs:
       - name: Checkout Repo
         uses: actions/checkout@v4
 
-      - name: Setup Node.js 18.x
+      - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 18.x
+          node-version-file: '.nvmrc'
+          cache: 'npm'
 
       - name: Install Dependencies
         run: npm ci

.github/workflows/test-plugin.yml

@@ -23,6 +23,8 @@ jobs:
         env:
           PHP_VERSION: ${{ matrix.php }}
           WP_VERSION: ${{ matrix.wordpress }}
+          DOCKER_BUILDKIT: 1
+          COMPOSE_DOCKER_CLI_BUILD: 1
         working-directory: ./
         run: |
           docker compose build \

.github/workflows/wpcs.yml

@@ -15,6 +15,17 @@ jobs:
         with:
           php-version: '8.1'
 
+      - name: Get Composer cache directory
+        id: composer-cache
+        run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
+
+      - name: Cache Composer dependencies
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: ${{ runner.os }}-composer-
+
       - name: Install Dependencies
         run: composer install