Allow passing options to fetch

[Magi1053]

Looks like this should be simple to implement and absolutely required for my use case, as I need to be able to pass an agent property to the fetch options but it seems like this is not currently allowed. Looking at the code all I need is to be able to add custom values to the init (type RequestInit) property (possibly through a core.config entry) and it should pass through.

api/packages/core/src/index.ts

Lines 100 to 110 in 685212b

	const init: RequestInit = {};
	if (this.config.timeout) {
	const controller = new AbortController();
	timeoutSignal = setTimeout(() => controller.abort(), this.config.timeout);
	init.signal = controller.signal;
	}
	// `getHarForRequest` returns a partial HAR object, by way of `@readme/oas-to-har` but
	// `fetch-har` is typed to expect the full thing. Though we're supplying an incomplete HAR
	// object, at least the spec, our partial is fine.
	return fetchHar(har as unknown as Har, { files: data.files || {}, init, userAgent: this.userAgent })

[Magi1053]

[erunion]

If you would like to submit a PR for this we'll accept it!

[bombillazo]

Similar to this, is there currently any way to pass or set interceptors to the fetch client?

[erunion]

@bombillazo Unfortunately not right now.