Support route rules per HTTP verb

[Barbapapazes]

Describe the feature

Hello,

Actually, a route rule apply to a pattern but having it per http verb could be useful, especially for rate limiting.

Imagine the route GET /me, I do not need to rate limit it but the route PATCH /me will send an email to the user so I need to rate limit it.

Additional information

• Would you be willing to help implement this feature?

[pi0]

coming in nitro v3 (since new rou3 library used for route rule matching natively supports verbs. radix3 in v2 cannot)