Add local dotnet tool manifest for EF and trx-to-vsplaylist and validate EF migrations in CI (#1017)

Author: Copilot

.config/dotnet-tools.json

@@ -0,0 +1,20 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "dotnet-ef": {
+      "version": "10.0.7",
+      "commands": [
+        "dotnet-ef"
+      ],
+      "rollForward": false
+    },
+    "trx-to-vsplaylist": {
+      "version": "1.3.0",
+      "commands": [
+        "trx-to-vsplaylist"
+      ],
+      "rollForward": false
+    }
+  }
+}

.github/workflows/PR-Build-And-Test.yml

@@ -31,9 +31,17 @@ jobs:
       - name: Restore with dotnet
         run: dotnet restore /p:AccessToNugetFeed=false
 
+      - name: Restore local dotnet tools
+        run: dotnet tool restore
+
       - name: Build with dotnet
         run: dotnet build --configuration Release --no-restore /p:AccessToNugetFeed=false
 
+      - name: Check for pending EF Core model changes
+        run: dotnet ef migrations has-pending-model-changes --project EssentialCSharp.Web --configuration Release --no-build
+        env:
+          ASPNETCORE_ENVIRONMENT: Development
+
       - name: Expose GitHub Actions Runtime
         uses: actions/github-script@v9
         with: