chore: setup project for gradle cache test

.github/workflows/gradle-cache.yml

@@ -0,0 +1,37 @@
+name: Gradle cache test
+
+on: [workflow_dispatch, pull_request_target]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          java-version: 21
+          distribution: temurin
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+        with:
+          # The Gradle wrapper's version (already the default, putting it here to clarity)
+          gradle-version: wrapper
+          # Removing unused files from Gradle User Home before saving to cache (i.e. older versions of gradle)
+          gradle-home-cache-cleanup: true
+          # Cache downloaded JDKs in addition to the default directories.
+          gradle-home-cache-includes: |
+            caches
+            notifications
+            jdks
+          cache-encryption-key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
+          # Only write to the cache for builds on the 'main' and 'release' branches. (Default is 'main' only.)
+          # Builds on other branches will only read existing entries from the cache.
+          #cache-read-only: ${{ github.ref != 'refs/heads/main'  }}
+          # Allow writing to cache
+          cache-read-only: true
+      - name: Build with Gradle
+        env:
+          GRADLE_ENCRYPTION_KEY: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
+        run: ./gradlew build '-Pvaadin.productionMode' --stacktrace --info --no-daemon --scan
+

gradle.properties

@@ -1,2 +1,14 @@
 vaadinVersion=24.6.5
-hilla.active=false
+hilla.active=false
+
+# Kotlin
+kotlin.caching.enabled=true
+kotlin.incremental=true
+kotlin.incremental.useClasspathSnapshot=true
+kotlin.parallel.tasks.in.project=true
+# Gradle
+org.gradle.parallel=true
+org.gradle.caching=true
+org.gradle.daemon.idletimeout=3600000
+org.gradle.configuration-cache=true
+org.gradle.configuration-cache.max-problems=100