this commit introduces the .NET tools manifest

Author: https-richardy

.config/dotnet-tools.json

@@ -0,0 +1,20 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "dotnet-outdated-tool": {
+      "version": "4.7.1",
+      "commands": [
+        "dotnet-outdated"
+      ],
+      "rollForward": false
+    },
+    "dotnet-format": {
+      "version": "5.1.250801",
+      "commands": [
+        "dotnet-format"
+      ],
+      "rollForward": false
+    }
+  }
+}