Add .mcp.json to support azsdk agent mcp from copilot-cli (#46587)

* Add .mcp.json to support azsdk agent mcp from copilot-cli

Author: praveenkuttappan

.mcp.json

@@ -0,0 +1,19 @@
+{
+  "mcpServers": {
+    "azure-sdk-mcp": {
+      "type": "stdio",
+      "command": "pwsh",
+      "args": [
+        "./eng/common/mcp/azure-sdk-mcp.ps1",
+        "-Run"
+      ]
+    },
+    "github-agentic-workflows": {
+      "command": "gh",
+      "args": [
+        "aw",
+        "mcp-server"
+      ]
+    }
+  }
+}