Feature Request: URL handling in documentation

[witchof0x20]

Super niche issue, but I ran into this while parsing the MCP schema.

warning: this URL is not a hyperlink
    --> .../target/debug/build/mcp-58ca0a9bf43df898/out/schema.rs:3319:1
     |
3319 | https://datatracker.ietf.org/doc/html/rfc5424#section-6.2.1*/
     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: bare URLs are not automatically turned into clickable links
help: use an automatic link instead
     |
3319 | <https://datatracker.ietf.org/doc/html/rfc5424#section-6.2.1>*/

relevant schema line: https://github.com/modelcontextprotocol/specification/blob/main/schema/2024-11-05/schema.json#L1061

This could end up overly complex if "does this description contain a URL" is harder than one would expect, but it would be nice to wrap urls in <> when encountered to avoid the doc bug and produce better docs.