Create placeholderapi.yml

.github/workflows/placeholderapi.yml

@@ -0,0 +1,27 @@
+name: PlaceholderAPI Build
+
+on:
+  push:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+    if: "!startsWith(github.event.head_commit.message, 'ci-skip')"
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 17
+      uses: actions/setup-java@v3
+      with:
+        java-version: 17
+        distribution: temurin
+        cache: gradle
+
+    - name: Build artifacts
+      run: ./gradlew build
+
+    - name: Upload build artifacts
+      uses: actions/upload-artifact@v3
+      with:
+        path: build/libs/*.jar