fix(browser): Adjust transportOptions to support offline transport options

[Lms24]

As reported in #7766, our transportOptions init field currently isn't typed correctly to accept BrowserOfflineTransportOptions, causing type errors when trying to configure the offline transport. This PR fixes this bug by making BrowserTransportOptions extend BrowserOfflineTransportOptions.

closes #7766

[timfish]

I would need to test if it works but we might be be able to get the inference working for transportOptions from the supplied transport with this.

This is non-breaking since the generic has a default:

type BrowserOptions<TO extends BaseTransportOptions = BrowserTransportOptions> = Options<TO> & BrowserClientReplayOptions;

function init<TO = BrowserTransportOptions>(options: BrowserOptions<TO>) {

[timfish]

we might be be able to get the inference working for transportOptions from the supplied transport with this

Oh no, it's seems much more complicated and not a simple fix...

[Lms24]

Yeah I tried your suggestion but got type errors all over the place 😅 I'd say we go with this unless there are other concerns (happy to try something different though)

[timfish]

Yeah, I think this is good for now!