support the lavalink plugins ecosystem

[ooliver1]

Summary

add support for the plugins ecosystem

The Problem

Mafic does not add direct support for the custom search types, filters and track types plugins provide.

The Ideal Solution

Unsure

The Current Solution

Passing a string for search types, and raw queries.

Additional Context

https://github.com/freyacodes/Lavalink/blob/master/PLUGINS.md#lavalink-plugins

Progress

• Search types (feat: support plugin search types #31)
• Filters