Consider rewriting as a MPV IPC executable "script"

[eNV25]

https://mpv.io/manual/stable/#alternative-ways-of-starting-clients

Advantages

• Safe Rust since it's just JSON in a UNIX socket. We can get rid of unsafe and C FFI.

Disadvantages

• It's probably slower, but that's probably not relevant in this application.

Notes

• It doesn't work on Windows. That's not a problem since MPRIS is not relevant on windows.

[eNV25]

https://pages.pvv.ntnu.no/Grzegorz/mpvipc-async/main/docs/mpvipc_async/