fix: improve controller/injectable patterns

[elcharitas]

This PR handles some long standing issues with how ngyn treats controllers and injectables and introduces the following

• controller route methods are now required to borrow self rather than refrencing.
• less footprint with one single trait for both controllers and injectables
• slightly improved performance with middleware
• middlewares now receive a mutable response which follows suit with ngyn's principles in that responses should be mutable while requests shouldn't

[cocogitto-bot]

✔️ 6f1f87f...a770b7b - Conventional commits check succeeded.