Pure rename, no behavior change. create_mcp_server.tsx and its test move
to CreateMCPServer, the two importers and one stale e2e comment follow,
and the local/filename-pascal-case suppression drops now that the file
passes the rule on its own.
The rename is scoped to this one component rather than the whole
directory because three PRs are currently open against its snake_case
siblings; the rest can follow once those land.
9d5984b358