fix: allow programmatic visits to go cross-origin

[KonnorRogers]

Currently, when calling Turbo.visit("https://example.com", { action: "advance" }) , the site will not navigate to the https://example.com and in addition a number of errors pop up here:

Most of these errors have to do with trying to fetch cross-origin as well as adding history for a cross-origin url. This PR takes previous art from Turbolinks here:

https://github.com/turbolinks/turbolinks/blob/80cd172ed5b3a35eda85c58e428de9f1f1d06fc8/src/controller.ts#L70-L80

and uses previous art from Turbo's own link delegator here:

turbo/src/core/session.ts

Lines 334 to 336 in 5982a67

	locationIsVisitable(location: URL) {
	return isPrefixedBy(location, this.snapshot.rootLocation) && isHTML(location)
	}

Unfortunately, I ran into multiple issues trying to get tests for this due to my chromedriver only supporting up to v92 and chrome itself being v94. I tried manually installing and upgrading both and was unsuccessful. Regardless, I think drawing on prior art and having done some manual testing as well, all appears to be well.

Video Before:

Screen.Recording.2021-09-27.at.11.06.50.PM.mov

Video After:

Screen.Recording.2021-09-27.at.11.04.12.PM.mov

[Matt-Yorkley]

You're a star! 🌟

Just for clarity; this should close issue #401 right? Looks like there's a few folks that would be excited to see it fixed (myself included)

[KonnorRogers]

@Matt-Yorkley I believe that issue has to do with when you submit a form and then redirect to an external URL. This will not fix that. This is purely for programmatic visits. IE: Turbo.visit

[Matt-Yorkley]

@Matt-Yorkley I believe that issue has to do with when you submit a form and then redirect to an external URL. This will not fix that. This is purely for programmatic visits. IE: Turbo.visit

Ah, okay! I assumed if a Stream responded with a redirect to an external URL it would hit the same code path when it came to navigating..? I'll take your word for it though! 👌😄