fix: :bug: Add requestOptions to YAML config for mcp

[chezsmithy]

Description

Add request options to mcp server YAML config. Without this in place you can't pass headers for example.

Checklist

• [X] I've read the contributing guide
• [X] The relevant docs, if any, have been updated or created
• [X] The relevant tests, if any, have been updated or created

Screenshots

[ For visual changes, include screenshots. Screen recordings are particularly helpful, and appreciated! ]

Tests

Confirmed the following configuration loads headers in:

https://github.com/chezsmithy/continue/blob/16ef20aeca9696f0b751e590671111eafc5fcda7/core/context/mcp/MCPConnection.ts#L352

name: SSE Server
version: 0.0.1
schema: v1
mcpServers:
  - name: sse-server
    type: sse
    url: https://www.example.com
    requestOptions:
      headers: { Authorization: "Bearer ABC", JWT: XXASDASDSAS }

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🔨 Latest commit	81c20c11dbbce2eccefd00364c5b74b298b2f24f

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✨ No issues found! Your code is sparkling clean! ✨

[sestinj]

Edit: I see that this is potentially urgent for you. If you wanted to merge this in and make a follow up PR to address my comments, I would be okay with that

[chezsmithy]

@sestinj I think I would prefer to merge as is, given this is where the requestOptions are being pulled in. The contributor who made the original change based their work off the json config which had the requestOptions already included. I'd be cool if you want to open up a new issue and I can see how we can use the fetch override. https://github.com/continuedev/continue/blob/bb0490ad74fca80ba87a8d4d820d6d20744d4517/core/context/mcp/MCPConnection.ts#L364

[sestinj]

works for me. I made a follow up issue here @chezsmithy https://github.com/continuedev/continue/issues/6234