Revert "Delete main.yml"

This reverts commit a04fbeb1b5.

.github/workflows/main.yml

@@ -0,0 +1,24 @@
+name: 'Main'
+on:
+  pull_request:
+    paths:
+      - 'framework/**'
+      - 'modules/**'
+    branches:
+      - dev
+jobs:
+  build-test:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions/setup-dotnet@master
+        with:
+          dotnet-version: '3.0.100'
+          
+      - name: Build All
+        run: .\build-all.ps1
+        shell: pwsh
+
+      - name: Test All
+        run: .\test-all.ps1
+        shell: pwsh