ci: Added workflow cache

.github/workflows/build_push.yml

@@ -114,6 +114,14 @@ jobs:
           KEY_PASSWORD: ${{ secrets.KEY_PASSWORD }}
         run: chmod +x ./gradlew && ./gradlew -p src assembleRelease
 
+      - name: Cache build directories
+        uses: https://github.com/actions/cache/save@v3
+        with:
+          path: |
+            src/**/build
+            !src/**/build/outputs
+          key: build-cache-${{ github.sha }}-${{ matrix.chunk }}
+
       - name: Upload APKs
         uses: https://code.forgejo.org/forgejo/upload-artifact@16871d9e8cfcf27ff31822cac382bbb5450f1e1e # v4-patch
         if: "github.repository == 'Kohi-den/extensions-source'"