change name to RawName and have method for Name() that is normalized

[burmudar]

Raw Name is the name as it was parsed from the tool json
Name gives a name that uses kebab case and strips sg_ prefix ie. sg_commit_search becomes commit-search

Test plan

executed locally and unit tests use it

[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.}