feat: update dependencies

[kszinhu]

Description

This branch implements changes from serenity and songbird provides from CHANGELOG and CHANGELOG respectively.

Changes

+ Uses workspace to split in two crates (`bostil-core` and `bostil-app`)
+ Implements database service using `diesel` crate
+ Implements `tracing` instead of self-logging method
+ Added RADIO command
+ Created collectors abstraction

- Removes static database
- Removes self-logging methods
- Removes `ffmpeg` filters*

(*): wait until the possibility of adding filters to symphonia