feat(plugin-mcp): out of beta (#15711)

Removes beta flag from package.

Author: kendelljoseph

docs/plugins/mcp.mdx

@@ -8,11 +8,6 @@ keywords: plugins, mcp, ai, model context protocol, plugin, payload, cms
 
 ![https://www.npmjs.com/package/@payloadcms/plugin-mcp](https://img.shields.io/npm/v/@payloadcms/plugin-mcp)
 
-<Banner type="warning">
-  This plugin is currently in Beta and may have breaking changes in future
-  releases.
-</Banner>
-
 This plugin adds [Model Context Protocol](https://modelcontextprotocol.io/docs/getting-started/intro) capabilities.
 
 <Banner type="info">

packages/plugin-mcp/src/index.ts

@@ -18,7 +18,6 @@ export type { MCPAccessSettings }
  * The MCP Plugin for Payload. This plugin allows you to add MCP capabilities to your Payload project.
  *
  * @param pluginOptions - The options for the MCP plugin.
- * @experimental This plugin is experimental and may change in the future.
  */
 export const mcpPlugin =
   (pluginOptions: PluginMCPServerConfig) =>