fix: rename server files with transport suffix

- com.contentful-mcp.json -> com.contentful-mcp-npx.json (id: com.contentful-mcp-npx)

Signed-off-by: Mohammod Al Amin Ashik <maa.ashik00@gmail.com>

Author: its-mash

servers/com.contentful-mcp.json servers/com.contentful-mcp-npx.jsonservers/com.contentful-mcp.json renamed to servers/com.contentful-mcp-npx.json

@@ -1,7 +1,7 @@
 {
   "$schema": "../schemas/server-definition.schema.json",
-  "id": "com.contentful-mcp",
-  "name": "Contentful",
+  "id": "com.contentful-mcp-npx",
+  "name": "Contentful (npx)",
   "alias": "contentful",
   "description": "Manage Contentful spaces, content types, entries, and assets. Create and update structured content through the Content Management API.",
   "icon": "https://avatars.githubusercontent.com/u/472182?v=4",