can not customize npm_dependencies URLs

With rules_js `.npmrc` can be used to customize registry URLs, auth. Customizing the typescript URLs in rules_ts is difficult and undocumented, see ts/private/npm_repositories.bzl

Ideally this will respect all config from the npmrc such as auth, cacert, registry URLs etc.

Start with ts/private/npm_repositories.bzl and compare how rules_js uses .npmrc for registry URLs and authentication. Trace the current TypeScript URL configuration and determine how npmrc settings such as auth, cacert, and registry URLs should be respected; done means those settings can customize the dependencies consistently.

Written by the indexing model from the issue text.