Migrate GUI to new renderer

[benreid24]

• [x] Complete interface design
  • [x] Notify component of new acquisition
  • [x] Notify component of element-specific state update
  • [x] Notify component of render settings change
  • [x] ECS entity method(s) on component for children
  • [x] Allow highlight state to be optional for component
• [x] Flash provider
• [x] Highlight provider
• [x] Tooltip provider
• [x] Batch index buffer
• [x] Batch shapes
• [x] Components
  • [x] Animation
  • [x] Box
  • [x] Button
  • [x] Canvas
  • [x] CheckButton
  • [x] ComboBox
  • [x] Icon
  • [x] Image
  • [x] Label
  • [x] Notebook
  • [x] ProgressBar
  • [x] RadioButton
  • [x] ScrollArea
  • [x] SelectBox
  • [x] Separator
  • [x] Slider
  • [x] TextEntry
  • [x] ToggleButton
  • [x] Window
• [x] FilePicker
• [x] Dummy entities
• [x] Fix bugs and refactor component interface
• [x] Cleanup/move old interface utilities