add mcp list-tools to list available tool calls

[burmudar]

add subcommand to mcp to list the various tools parsed from the mcp tool json

Test plan

executed locally

[burmudar]

This change is part of the following stack:

• mcp: add script to dump mcp tool list #1211
  • parse mcp tool json #1212
    • add mcp list-tools to list available tool calls #1213 ◀
      • change name to RawName and have method for Name() that is normalized #1214
        • build flagset from input schema to parse args #1215
          • make json rpc 2.0 call based on cli args #1216

_{Change managed by git-spice.}