GameMode system and generally everything in it done.
GameType needs more information but it works.
/play with queue works.

TODO:
- add way to join game
- connect everything
- add ways to manage gameType (not only name and length )

Code changes in github.

Fixed non-null Arena class.
Added hover and click event to messages arena (now editable).
Added better tasking with Editor.java
Added ability to no-open gui with /arena command
Added way to display hover/click event into message.

Updated TODO file.
Changed program level to 15+.
Added pluginManager and registering events to PluginController.java.
Added 2 new commands: /arena which shows arenas and /arenaeditor that allows you to edit spawns/bounds location.
Added 2 events class: PlayerBlockInventoryMovement.java, PlayerBreakBlockEvent.java.
Added Executor.java for /arena command, and added Editor.java for /arenaeditor command.
Added Editor catalog with files.
Added Arena file.

Fixed 2 possible ways to generate null exception in Executor.java
Created Utils.java and method Utils.isNumeric to check if string is a number

Added Informator.java, which will tell about:
- tps status, entities usage, class usage, classes, errors, debug mode....

Changed EntityType type into String type,

Changed format of EntityFile,

Added naming as key not as name in entity config,

Added entire new Executor.java which adds /entity (name) <times>*
<>* - optional,

Fixed creating Entity File,

Added spawnEntity void for times spawning,

Changed setAI of entity to true, (can be changed soon/own system for finding pathway to destroy village)

Title.

Started making entity editor

Now, class in config look like this:
Class1:
name: '&b&lWarrior'
lore:
- ''
- '&0&m&l-----------------'
- '&6&lLegendary class'
- '&7Special abilites'
- '&0&m&l-----------------'
- '&eOnly this day this'
- '&eclass is very cheap'
- ''
- '&9&l50$ &8&m120$'
visibleInGui: true
glowing: false
hiddenAttributes: true
material: Material.DIRT