Improve ingame help menu

[Seeloewen]

The ingame help menu does currently not contain anything useful, just some basic information. It could be improved with some general information and an FAQ on how to use/install the datapack for example and solutions for common issues.

Here's an idea of how the menu could be structured:

Help
╠ General Overview
║ ╚ General overview of what the datapack does
╠ Settings
║ ╚ A list of how to change the most common settings like timer and item categories
╠ Common Issues
║ ╚ Issues like version incompatibility, wrong folder, etc.
╚ Installation on Server
___╚ Where to install the datapack on a server