ci: properly cache yarn deps

packages/actions/src/yarnCache/action.yml

@@ -0,0 +1,35 @@
+name: 'yarn install'
+description: 'Run yarn install with node_modules linker and cache enabled'
+runs:
+  using: 'composite'
+  steps:
+    - name: Expose yarn config as "$GITHUB_OUTPUT"
+      id: yarn-config
+      shell: bash
+      run: |
+        echo "CACHE_FOLDER=$(yarn config get cacheFolder)" >> $GITHUB_OUTPUT
+
+    - name: Restore yarn cache
+      uses: actions/cache@v3
+      id: yarn-download-cache
+      with:
+        path: ${{ steps.yarn-config.outputs.CACHE_FOLDER }}
+        key: yarn-download-cache-${{ hashFiles('yarn.lock') }}
+        restore-keys: |
+          yarn-download-cache-
+
+    - name: Restore yarn install state
+      id: yarn-install-state-cache
+      uses: actions/cache@v3
+      with:
+        path: .yarn/ci-cache/
+        key: ${{ runner.os }}-yarn-install-state-cache-${{ hashFiles('yarn.lock', '.yarnrc.yml') }}
+
+    - name: Install dependencies
+      shell: bash
+      run: |
+        yarn install --immutable --inline-builds
+      env:
+        YARN_ENABLE_GLOBAL_CACHE: 'false'
+        YARN_NM_MODE: 'hardlinks-local'
+        YARN_INSTALL_STATE_PATH: .yarn/ci-cache/install-state.gz