Create quest system

[Falerhon]

• [x] Create quests with objectives
• [x] create quest holder to have multiple quests at once
• [x] Create quest manager to tell whether or not a quest is complete
• [x] Create quest UI
• [x] Allow quests to communicate with other classes using event
• [ ] Add event triggers to quest objects (npcs, monsters, interactables...)

**Might reuse previously made quest system with modifications

[Falerhon]

Used a previously made quest system and modified it to be able to hold multiple quests at once and have a better way of getting the objectives.

Quests are scriptable objects containing their own stats (reward, name, description...). These quests can hold a list of goals. Goals are also scriptable objects, containing a goal type, a number of time something has to be done and a description. An event manager with special event is used to tell the goals an action has been done A quest manager is used to store currently accepted quests, add new quests, remove completed quests, and manage goals event types