Feature/47 - Skill Player + Organization

[CollinHerber]

### Link Issues Resolves: #47

Description of Work

• Adds in the "ExtraPoints" bit to TreeSystem ModPlayer to allow for extra passive points to be rewarded from quests/etc
• Reorganizes the GUI bits into folders for a bit more clarity
• Adds the SkillPlayer ModPlayer to handle tracking skill points
• Adds in an event to UIDragablePanel to tell the tabs that are swapped between
• Implements swapping between skill tree and passive tree
• Some organization things such as removing default types, updating namespaces, removing unused using directives

Comments

The skill tree itself is unfinished and a ticket will be created to create this experience