Improvement: Add Suggestion Provider and guild support in tab complete

[ThatGravyBoat]

What

Adds suggestion provider to create suggestion trees to suggest appropriate arguments for commands.

Changelog Improvements

• Add support for Guilds in player related tab completes - ThatGravyBoat
• Add support for all guild and friend commands in tab complete - ThatGravyBoat

Changelog Technical Details

• Add SuggestionProvider. - ThatGravyBoat
  • This is a new class that can be used to build suggestion trees easily.