lsp: publish diagnostics for import maps
We should publish diagnostics for import maps (there are diagnostics available when parsing the import map, but also we should include things like the missing cache and the code actions to cache specifiers).
Ref: denoland/import_map#42 which is required for this.
@kitsonk Just noticed that using import map would make the Typescript hints(not sure the official name in LSP world) disappear, is there a seperate ticket that will tackle that issue?
Sorry ignore my noise there, I figured out that there is a setting for import_map.json and it will works: https://deno.land/[email protected]/vscode_deno