* 🔥 feat: add Req and Res interfaces
Split the existing Ctx API into two separate APIs for Requests and
Responses. There are two goals to this change:
1. Reduce cognitive load by making it more obvious whether a Ctx method
interacts with the request or the response.
2. Increase API parity with Express.
* fix(req,res): several issues
* Sprinkle in calls to Req() and Res() to a few unit tests
* Fix improper initialization caught by ^
* Add a few missing methods
* docs: organize Ctx methods by request and response
* feat(req,res): sync more missed methods
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Co-authored-by: Juan Calderon-Perez <835733+gaby@users.noreply.github.com>
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