Migrate from warp to a simpler web framework

[nochiel]

Warp's Filter system is nice but I get an avalanche of insoluble type errors when trying to compose (include/exclude) routes based on optional features (bc-server's modules are implemented as optional features). 😭 After weeks of experimenting I'm hard-stuck on compiler errors.

This appears to be an open issue for users of the library. (See: seanmonstar/warp/issues/1060.)

To-do

Test:

• [ ] https://salvo.rs/
• https://github.com/tokio-rs/axum

[nochiel]

Fixed by 3987b93.