Add GitHub Actions CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,95 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch:
+
+jobs:
+  test:
+    name: Run Tests
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      checks: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          lfs: true
+
+      - name: Cache Library
+        uses: actions/cache@v4
+        with:
+          path: Library
+          key: Library-${{ hashFiles('Assets/**', 'Packages/**', 'ProjectSettings/**') }}
+          restore-keys: |
+            Library-
+
+      - name: Run EditMode tests
+        uses: game-ci/unity-test-runner@v4
+        env:
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+        with:
+          testMode: editmode
+          githubToken: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Run PlayMode tests
+        uses: game-ci/unity-test-runner@v4
+        env:
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+        with:
+          testMode: playmode
+          githubToken: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: Test results
+          path: artifacts
+
+  build:
+    name: Build for ${{ matrix.targetPlatform }}
+    runs-on: ubuntu-latest
+    needs: test
+    permissions:
+      contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        targetPlatform:
+          - StandaloneWindows64
+          - StandaloneLinux64
+          - StandaloneOSX
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          lfs: true
+
+      - name: Cache Library
+        uses: actions/cache@v4
+        with:
+          path: Library
+          key: Library-${{ matrix.targetPlatform }}-${{ hashFiles('Assets/**', 'Packages/**', 'ProjectSettings/**') }}
+          restore-keys: |
+            Library-${{ matrix.targetPlatform }}-
+            Library-
+
+      - name: Build project
+        uses: game-ci/unity-builder@v4
+        env:
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+        with:
+          targetPlatform: ${{ matrix.targetPlatform }}
+
+      - name: Upload build artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: Build-${{ matrix.targetPlatform }}
+          path: build/${{ matrix.targetPlatform }}