Consider using hyper directly

[m4tx]

Unless we use some specific features of axum, we shouldn't actually need it. Currently we re-implement router, request handler trait, among others anyway. It would be nice to just depend on hyper directly instead, slightly shrinking the dependency tree.

[yonas]

There are middleware for axum that cot developers can leverage.

[m4tx]

There are middleware for axum that cot developers can leverage.

@yonas fair point, although most axum middleware are just regular tower middleware, and therefore should be compatible with Cot. The only ones that do not fall in this category are the ones created with axum::middleware::from_fn and ones using some specific features of Axum. I'm not sure how common these are.