Document & maintain ECS structure

[numpad]

Create a document/graphic/... of some sort to describe the components, systems and events used.

Per system:

• [ ] Tick/Execution order (ExO)
• [ ] Short description
• [ ] Depends on other systems? [1]
• [ ] Type (Update, Render, Event, ...)
• [ ] Affected Components
• [ ] Reacts to which events?

Per component:

• [ ] Requires other component?

Per event:

• [ ] Short description
• [ ] Trigger condition
• [ ] Affected systems

[1]: Is ExO important? F.ex. RenderSystem depends on data from PositionUpdateSystem, otherwise every rendering would be a frame too late.