feat(http/unstable): add support for multiple request methods on route

[LitoMore]

This is an approach for #5993 (comment).

It allows the method option to accept a string | string[] value type. It's more convenient for some similar handlers.

Here are some examples:

const route: Route[] = [
	{
		method: ["GET", "HEAD"],
		pattern: new URLPattern({ pathname: '/status' }),
		handler: (req: Request) => new Response(req.method === 'HEAD' ? null : 'ok'),
	},
]

const route: Route[] = [
	{
		method: ["POST", "UPDATE", "DELETE", ...somethingElse],
		pattern: new URLPattern({ pathname: '/users/:id' }),
		handler: (req: Request) => {
			prepareSomething();
			switch (req.method) {
				case "POST":
					createUser();
					break;
				case "UPDATE":
					updateUser();
					break;
				case "DELETE":
					deleteUser();
					break;
				default:
					runSomethingElse();
					break;
			}
			const result = getConclusion();
			return new Response(result);
		},
	},
]

Closes #5993

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.28%. Comparing base (3b51807) to head (13a90f3).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6003      +/-   ##
==========================================
- Coverage   96.29%   96.28%   -0.01%     
==========================================
  Files         493      493              
  Lines       39528    39533       +5     
  Branches     5833     5837       +4     
==========================================
+ Hits        38063    38065       +2     
- Misses       1423     1426       +3     
  Partials       42       42              

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[kt3k]

Thanks for the PR. This makes sense to me. LGTM

[kt3k]

Does anyone have any concern to this addition?

[iuioiua]

Actually, this seems fine. Thank you.