feat: use nuxt's base url setting

[JoaoPedroAS51]

I opened a new PR due to conflicts, as #489 is outdated.

// cc @NickBolles

There are 3 main changes here

1. Update insidePage to take the context
2. Update isSameURL to take the context
3. Update normalizePath to take the context
4. For each of those if the context is passed in, replace the base path in the path we are checking with "/"
5. In oath2.js and middleware.js pass in context to these functions to allow the checks to succeed correctly.

The only real issue with this (If i remember correctly) was that the callback path for OAUTH2 was not using the base path. But once we start using the base path it would also throw off the checking to see if this is the same route or not

Fixes #275, fixes #879
Closes #489

[pi0]

I would split this out of normalizePath into a utility like withoutBase(path, base). Also would be nice at some point we migrate to ufo since it is standard library we started using in several places

[JoaoPedroAS51]

I think I'll let this migration with you, as you are the author of ufo and I've not used it yet.

[JoaoPedroAS51]

Yeah, good idea! I agree about splitting into withoutBase. But should I do it tomorrow or wait for ufo migration?