feat(cli-utils): Add threading utilities for CLI

[!NOTE] No changeset, since it's not implementing features yet.

Summary

This creates a very small utility that allows us to thread commands without much hassle. It has very limited feature support but the basic idea is that we've got two files.

The command would async-import a separate thread module, which would export an async generator function. This way we can split up the threaded task into multiple signals (unfortunately, no return value though, of course):

// in the main command file
async function mainCommand() {
  const { runThing } = await import('./thread');
  for await (const signal of runThing(...args)) {
    signal;
  }
}

The threaded file would then expose an async generator function wrapped with the threading utility:

// in the threaded file
async function* _runThing() {
  yield 'my signal';
}

export const runThing = expose(_runThing);

This is pretty poor code and doesn't handle all edge cases and only handles async generators, but it's good enough for our purposes.

Once merged with #197, we're probably ready for the last steps,

some CLI cleanups and styling their outputs
tsconfig.json cleanup and adding some CLI arguments we may have missed
fix remaining warnings and null/undefined returns for styled output

Set of changes

Implement threads utility

0no-co / gql.tada

feat(cli-utils): Add threading utilities for CLI #198

Summary

Set of changes

⚠️ No Changeset found