refactor play.js, add debugger and equalizer

[twlite]

did some modifications to play command to use player.play() method, added debug events (helpful to see how far the bot goes before error is thrown, or other informations), and equalizer command.

As a side note, usage of global.player is not needed as same thing can be done via useMasterPlayer hook exported by discord-player.

useMasterPlayer()

https://discord-player.js.org/docs/guides/using-hooks#usemasterplayer-fetch-the-player-instance

Lyrics

https://discord-player.js.org/docs/guides/getting-lyrics

[revot334]

not in the project's path with the debugger and equalizer the player looks fine

[twlite]

not in the project's path with the debugger and equalizer the player looks fine

what do you mean by that?