Convert to monorepo structure

[Shubhdeep12]

a suggestion -

let's split it into separate packages:

• mcp-server
• mcp-core – shared types, helpers, config (errors, logger, etc.)
• mcp-cloudflare
• mcp-cli
• mcp-evals

We can set up a pnpm workspace and move the existing code into these packages.

[Shubhdeep12]

Definitely, this can pulled off once #9 is completed.

[Shubhdeep12]

hey @drish any thoughts here?

[felipefreitag]

I think we'll get to this during the implementation of the hosted MCP server