Add local dotnet tool manifest

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Co-authored-by: BenjaminMichaelis <22186029+BenjaminMichaelis@users.noreply.github.com>

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
+    }
+  }
+}