feat: add initial .NET CI workflow configuration

Author: vycdev

.github/workflows/dotnet-ci.yml

@@ -0,0 +1,34 @@
+name: .NET CI
+
+on:
+    push:
+        branches: [main]
+    pull_request:
+        branches: [main]
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+
+            - name: Setup .NET
+              uses: actions/setup-dotnet@v3
+              with:
+                  dotnet-version: "8.0.x"
+
+            - name: Cache NuGet packages
+              uses: actions/cache@v4
+              with:
+                  path: ~/.nuget/packages
+                  key: ${{ runner.os }}-nuget-${{ hashFiles('**/*.csproj', '**/*.props', '**/*.targets') }}
+                  restore-keys: |
+                      ${{ runner.os }}-nuget-
+
+            - name: Restore
+              run: dotnet restore
+
+            # Debug build because it's faster.
+            - name: Quick Build (Debug)
+              run: dotnet build --no-restore