feat(lsp): allow to connect V8 inspector (#21482)

This commit adds a way to connect to the TS compiler host that is run
as part of the "deno lsp" subcommand. This can be done by specifying 
"DENO_LSP_INSPECTOR" variable.

---------

Co-authored-by: Nayeem Rahman <nayeemrmn99@gmail.com>

cli/lsp/repl.rs

@@ -300,6 +300,7 @@ pub fn get_repl_workspace_settings() -> WorkspaceSettings {
     import_map: None,
     code_lens: Default::default(),
     internal_debug: false,
+    internal_inspect: Default::default(),
     log_file: false,
     lint: false,
     document_preload_limit: 0, // don't pre-load any modules as it's expensive and not useful for the repl