Allow user to set volume.

This allows using `KeyCode::Char(' ')` to play and pause.

This adds play, pause & playpause functionality. The media keys
haven't been tested but in theory should work.

This is so that media controls work when implemented.

`minimp3` used to depend on `slice-deque` which is unmaintained and
contains memory safety issues, see
https://github.com/germangb/minimp3-rs/issues/42

`minimp3` now uses `slice-ring-buffer`

the closing bracket was missing from the CI badge

feat: add systemd service commands

chore: package for ubuntu/debian and fedora

ci: include README.md and LICENSE to the final archive

ci: install protoc from homebrew

feat(api): add provider to request parameters

feat(api): call a generic radio provider

fix(ui): handle unknown station name and bitrate

feat(provider): add new radio provider: radio-browser

ci: install build deps

ci: install build deps

ci: upgrade fluentci action

ci: use rust 1.84