[MZ] SFX Control Plugin

This plugin improves your ability to handle sound effects in RPG Maker MZ, allowing you to:

- Loop sound effects
- Have multiple instances looping at the same time
- Specify frame gaps before/after each sound to avoid overlap
- Control volume, speed and pitch

It takes into account the user defined volume in the game's settings, and runs completely independent from the native RPG Maker audio architecture in order to avoid issues like desyncing due to low framerate and misc. engine limitations.

How to use:

- Add a plugin command to your event
- Select the sound you want to play
- (Optional) Set a unique Instance ID for when you need multiple instances
- Adjust other parameters as needed