feat(lsp): ability to configure document pre-load limit (#19097)

Adds a `deno.preloadLimit` option (ex. `"deno.preloadLimit": 2000`)
which specifies how many file entries to traverse on the file system
when the lsp loads or its configuration changes.

Closes #18955

cli/lsp/repl.rs

@@ -294,6 +294,7 @@ pub fn get_repl_workspace_settings() -> WorkspaceSettings {
     inlay_hints: Default::default(),
     internal_debug: false,
     lint: false,
+    document_preload_limit: 0, // don't pre-load any modules as it's expensive and not useful for the repl
     tls_certificate: None,
     unsafely_ignore_certificate_errors: None,
     unstable: false,