Added some code to the Flag, Flags and FlagManager classes to enable
passing the tests.
Realized that some flags had duplicate icons. This means that the
getFlagByIcon() method doesn't work because there could be more than
one. If we want to allow duplicate icons then we need to change the
manager. Also, do we need to getFlagByIcon method?
It currently just displays a panel with all the flags in it. And throws exception when clicking on an item :P
Flag no longer have a PanelItem but Material instead as the icon.
Added a toPanelItem() method in Flag
Made the Panel(Builder) not using the Optional as fields anymore
This approach simulates an enum, but one that can be extended by others
to add custom flags. I added a handy values() method that uses
reflection to provide a list of all the flags in the class.
See TestBSkyBlock.java test classes for the tests of the default flag
registration and the custom flag registration.
This is required for automated testing (can't use static getInstance). I
really need automated testing of the protection classes, so even though
this adds a parameter to the classes, it's important to have it right
now.
Made getIslandsAt() Optional to enable better code structures in the
listeners.
Created an abstract class to simplify flag protection listeners.
Added default setting for flags that will be able to be set by config.
This default is used for any space in the worlds not occupied by an
island.
