feat: MCP Servers with CRUD operations

[wagnerjt]

Title

MCP Server CRUD operations for the following endpoints and operations:

1. Allow proxy admin to perform create, update, and delete operations on MCP servers in the db.
2. Allows users to view the mcp servers they have access to.

It works following the Least-Privilege Principle, where if no mcp servers are included at the token level, then the user won't have access (with the exception of admin-like users).

• We first find all access by token and if there is the special all-team-mcpservers, then we additionally grab all the team's mcp server list.

Endpoints here:

- GET `/v1/mcp/server` - Returns all of the configured mcp servers in the db filtered by requestor's access
- GET `/v1/mcp/server/{server_id}` - Returns the the specific mcp server in the db given `server_id` filtered by requestor's access
- GET `/v1/mcp/server/{server_id}/tools` - Get all the tools from the mcp server specified by the `server_id` 
  - (stubbed)
- POST `/v1/mcp/server` - Add a new external mcp server.
- DELETE `/v1/mcp/server/{server_id}` - Deletes the mcp server given `server_id`.

Note: Tests will be added shortly. I wanted to get feedback on the endpoint difference since these are not consistent with LiteLLM's info requests and the update will be a PUT instead of the POST

I am going to add the additional team + token CRUD operations in another PR, but have it stubbed out for now.

Relevant issues

MCP Server Discussion

Pre-Submission checklist

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Type

🆕 New Feature
📖 Documentation
✅ Test

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Name	Status	Preview	Comments	Updated (UTC)
litellm	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 9, 2025 8:23pm

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[ishaan-jaff]

LGTM, but please add testing

[wagnerjt]

Some UI snippets included.

The tools view and usage haven't been connected with the global mcp store, so at the moment the tools list returns nothing, but on click still shows the same component