ci: add ci to build mod

Author: jimchen5209

.github/workflows/build.yml

@@ -0,0 +1,64 @@
+# Automatically build the project and run any configured tests for every push
+# and submitted pull request. This can help catch issues that only occur on
+# certain platforms or Java versions, and provides a first line of defence
+# against bad commits.
+
+name: build
+on: [pull_request, push]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        # Use these Java versions
+        java: [
+            21    # Latest version
+        ]
+        # and run on both Linux and Windows
+        os: [ ubuntu-latest, windows-latest ]
+      fail-fast: false
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Validate gradle wrapper
+        uses: gradle/actions/wrapper-validation@v4
+      - name: Setup jdk ${{ matrix.java }}
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: ${{ matrix.java }}
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+      - name: Build
+        run: ./gradlew build
+      - name: SHA256 Checksum
+        if: ${{ runner.os == 'Linux' && matrix.java == '21' }} # Only checksum artifacts built from LTS java on one OS
+        run: |
+          sha256sum fabric/build/libs/* | sed 's|fabric/build/libs/||' >> sha256-fabric.txt
+          sha256sum neoforge/build/libs/* | sed 's|neoforge/build/libs/||' >> sha256-neoforge.txt
+      - name: Publish Checksum Output to Summary
+        if: ${{ runner.os == 'Linux' && matrix.java == '21' }} # Only upload artifacts built from LTS java on one OS
+        run: |
+          {
+            echo "### Artifact SHA256"
+            echo '```terraform'
+            echo '# Fabric`
+            cat sha256-fabric.txt
+            echo '# Neoforge'
+            cat sha256-neoforge.txt
+            echo '```'
+            echo "### Gradle Summary"
+          } >> $GITHUB_STEP_SUMMARY
+      - name: Capture fabric build artifacts
+        if: ${{ runner.os == 'Linux' && matrix.java == '21' }} # Only upload artifacts built from LTS java on one OS
+        uses: actions/upload-artifact@v4
+        with:
+          name: fabric-builds
+          path: fabric/build/libs/
+      - name: Capture neoforge build artifacts
+        if: ${{ runner.os == 'Linux' && matrix.java == '21' }} # Only upload artifacts built from LTS java on one OS
+        uses: actions/upload-artifact@v4
+        with:
+          name: neoforge-builds
+          path: neoforge/build/libs/