feat: mcp bundle tool integration

[soyuka]

Q	A
Branch?	main
Tickets	na
License	MIT
Doc PR	needed

Rework of https://github.com/api-platform/core/pull/7458

Now with a simpler approach, this gives the ability to add McpTool (upcoming McpResource) to any API Platform environment giving access to:

• automatic input JSON Schema's (waiting for https://github.com/modelcontextprotocol/php-sdk/pull/153 for output schema compatiblity)
• automatic structured content
• reuses the Symfony serializer under the hood (with all the capabilities of API Platform including optional iris using item_uri_template)
• allows to return a custom CallToolResult (from the php-sdk itself for images, sound etc.)
• ability to reuse Symfony validation constraints as usual
• works with doctrine entities if needed (calls the provider and the processor on demand)
• integrates with the symfony security features

TODO:

• [ ] test with #[McpTool] attribute
• [ ] test using an entity
• [ ] test custom CallToolResult content
• [ ] test validation
• [ ] test #[McpResource]

Because MCP uses JSON-RPC under the hood with some particular response objects (from php-sdk) we can not change returned headers yet (we'll work on an extension point).