cmd/templ/lspcmd/proxy: set 'templ' as client name in initialize client info

[hyangah]

This allows gopls to recognize gopls instances serving for templ and count separately in go telemetry data processing.

[a-h]

Ah, good idea! I'm not familiar with the format of adding a ; followed by the name, is that common practice?

Do you any links to the telemetry dataset etc. or conversations about that?

The reason I ask is that once it's set, it's probably hard to change, since it would affect historic data collection, so I just want to cover that before merging.

I'd like to see telemetry of the templ LSP. For example, it may be possible to see new issues early using the telemetry.

[hyangah]

Hi @a-h
golang/go#70205 is the upstream issue. After the discussion, we think just setting "templ" instead of appending it is the right approach. Updated the PR.

[a-h]

Thanks! I'll probably be able to look at this the day after tomorrow.