Add files via upload

.github/workflows/build.yml

@@ -0,0 +1,39 @@
+name: build
+
+on: [push, workflow_call]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up JDK 17
+      uses: actions/setup-java@v3
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+
+    - name: Validate Gradle wrapper
+      uses: gradle/wrapper-validation-action@v1
+
+    - name: Grant execute permission for gradle
+      run: chmod +x gradlew
+
+    - name: Build with Gradle
+      uses: gradle/[email protected]
+      with:
+        arguments: build
+
+    - name: Upload Jars
+      uses: actions/[email protected]
+      with:
+        name: Shimmer
+        if-no-files-found: error
+        path: |
+          Fabric/build/libs
+          Forge/build/libs