Add CI script

Author: ManlyMarco

.github/workflows/ci.yaml

@@ -0,0 +1,17 @@
+name: CI
+
+on: 
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-dotnet@v4
+      - run: dotnet build RuntimeUnityEditor.sln --configuration Release
+      - uses: actions/upload-artifact@v4
+        with:
+          name: ${{ github.event.repository.name }}_${{ github.sha }}
+          path: bin/**/*.dll