feat: resolve Prettier config from file for payload generate:types cmd

[proto-cool]

What?

This PR extends the generateTypes.ts script to read from the appropriate prettier config in a user's Payload application (if one exists), so that the output of payload generate:types (payload-types.ts) respects the prettier configuration.

Why?

The payload-types.ts file that was generated by Payload was previously not respecting the prettier configuration when generated by payload generate:types. While not a major issue by any measure (i.e., there are workarounds, like formatting with commit hooks on downstream consumers of payload-types.ts, it is nice to have it respect the existing config if possible.

How?

I started with the prettier config resolution found in packages/drizzle/src/utilities/createSchemaGenerator.ts, but since I define my prettier with the key in package.json like the following:

"prettier": "./prettier.config.mjs"

The resolution of the actual config was not working quite correctly as I guess the standard prettier.resolveConfig() does not play nice with ESM module configs (maybe I'm doing something wrong in my repo with that config?)

Anyway, I stubbed it out into a function loadPrettierConfig() which does exactly that, otherwise returning the old default of just { singleQuote: true }.

Maybe the contents of loadPrettierConfig() needs adjustment, but overall this does function with my personal Payload project at respecting my prettier settings when exporting payload-types.ts, and the the dev:generate-types call seems to also respect changes to the config in the payload monorepo when testing, which I believe would be preferable.

Please let me know if you have any thoughts or questions!