Provide LS-powered code intelligence on the web

[radeksimko]

Background

We have made the extension available from v2.25.0 as part of #768 / #1210

This represents an initial stage, to gather feedback and gauge interest in web extensions generally, but it only provides syntax highlighting via static grammar, no code intelligence, such as

• autocompletion
• formatting
• hover
• go-to-definition
• go-to-references
• symbol outline
• etc.

Proposal

• Better understand potential/interest through telemetry data
  • how many active users use the extension on the web?
  • talk to users who do use it on the web - in what context do they use it?
  • is there a use case which cannot be (easily) covered by Codespaces w/ hosted LS on the backend?
• Explore how much effort would it be to build the language server for WASM and make it available in the browser that way

[radeksimko]

Related: golang/go#58141