Custom components editor: external components type definitions

[Janpot]

Load type definitions of url imports for autocompletion in monaco-editor.

Read -typescript-types header (Same way deno does it https://deno.land/manual/typescript/types#using-x-typescript-types-header)

[prakhargupta1]

7-month-old issue, is it still relevant?

[Janpot]

yes, it's about having autocomplete for externally imported code