chore: add caching for pnpm store to improve build performance

Author: TerrorSquad

booster/.github/actions/php-auto-fix/action.yml

@@ -66,6 +66,20 @@ runs:
         version: ${{ steps.pnpm-version.outputs.version }}
         run_install: false
 
+    - name: Get pnpm store directory
+      id: pnpm-cache
+      shell: bash
+      run: |
+        echo "store=$(pnpm store path --silent)" >> $GITHUB_OUTPUT
+
+    - name: Cache pnpm store
+      uses: actions/cache@v3
+      with:
+        path: ${{ steps.pnpm-cache.outputs.store }}
+        key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+        restore-keys: |
+          ${{ runner.os }}-pnpm-store-
+
     - name: Get Composer Cache Directory
       id: composer-cache
       shell: bash