Add local settings for MCP and update command execution

- Created a new settings.local.json file to enable MCP servers with "shadcn".
- Updated .mcp.json to change the command execution from "npx" to "cmd" for better compatibility.

.claude/.mcp.json

@@ -1,12 +0,0 @@
-{
-  "mcpServers": {
-    "playwright": {
-      "type": "stdio",
-      "command": "npx",
-      "args": [
-        "@playwright/mcp@latest"
-      ],
-      "env": {}
-    }
-  }
-}

.claude/settings.local.json

@@ -0,0 +1,6 @@
+{
+  "enabledMcpjsonServers": [
+    "shadcn"
+  ],
+  "enableAllProjectMcpServers": true
+}

.mcp.json

@@ -1,8 +1,10 @@
 {
   "mcpServers": {
     "shadcn": {
-      "command": "npx",
+      "command": "cmd",
       "args": [
+        "/c",
+        "npx",
         "shadcn@latest",
         "mcp"
       ]