Launcher support for browsers

[bradfrosty]

Is your feature request related to a problem? Please describe.
Not related to a problem.

Describe the solution you'd like
I would like to see support for launchers in browser instrumentation (e.g. otel-launcher-js or otel-launcher-browser). The only node related features I see in this launcher are access to process and os. I know it's against the point of this project to say "they could be configurable", so maybe it makes sense to have a separate project for browser JS?

Describe alternatives you've considered
I currently maintain our own configuration in the browser. As opposed to sharing our configuration with other applications within my organization, it would be nice to use launchers.

Additional context
None