V2 Spec Additions

[olaservo]

Fixes: https://github.com/modelcontextprotocol/inspector/issues/947

Changes:

• Adds a spec file for UX
• Adds my takes on which tech to use for http and logging

Methodology:

• Used Claude Opus 4.5 to analyze MCPJam source and latest MCP spec schema to propose UX and features to add to current spec files
• Started grabbing a few feature requests ad-hoc from current inspector issues that seem like they should be included (such as support for official registry server.json)

Other notes:

• I think it would be ideal to get something interactive going early, so I am generating a couple simple prototypes to get a feel for what the code would actually look like and how it might work in practice. Will post those in the discord and latest WG discussion thread.
• If that method works well, we can let claude [or insert your fav bot here] to pick and choose what we like from those examples and use that to iterate on the spec.