Go libraries on Conan use a `go_` prefix (e.g. `go_uuid`) but the frontend
was constructing annotation URLs without it. Add library-level `lookupname`
support in options-handler so versions inherit it, and set `lookupname` and
`packagedheaders` on Go libraries. Also suppress the "no include paths"
warning for `packagedheaders` libraries since their paths are resolved at
build time.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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