type declarations for typescript

hi 👋 , was wondering if there are, or you're interested in adding type declarations for typescript.
this could be created as a .d.ts file here, or added to the https://github.com/DefinitelyTyped/DefinitelyTyped repo.

an incipient example of how this would look

declare module '@observablehq/runtime' {
  export class Inspector {
    constructor(element: unknown);

    pending(...args: unknown[]): unknown;

    rejected(...args: unknown[]): unknown;

    fulfilled(...args: unknown[]): unknown;
  }
  export class Runtime {
    constructor();

    module(
      notebook: unknown,
      handler: (name: string) => Inspector | boolean,
    ): void;

    dispose(): void;
  }
}

Start by reviewing the runtime's public API alongside the TypeScript example in the issue. Decide whether declarations belong in a .d.ts file here or in DefinitelyTyped, then ensure the exported API is represented and usable by TypeScript consumers.