Phase 2 - The beginnings of the scene system, code base polish and hardening, & advanced input system

[jeffbox12]

Subject to change

Task 1 — Code Refactor & Hardening
🚧 Document the code base
🚧 Refactor
✅ Use appropriate path limit
✅ Error checking
✅ Enclose debug code under a compile flag

Task 2 — Build, Dependencies & Distribution
Assess current dependency situation for each OS and document what external dependencies might require to be installed beforehand.

Task 3 — Input System
❌ Enable gamepad/controller support with SDL API
❌ Abstract input actions
❌ Design binding table
❌ Input override when the debug menu is opened

Task 4 — Scene System
❌ Scene creation/destruction interface
❌ Scene management
❌ Query input actions
❌ Integrate into the loop system
❌ Render "testshader" into the newly created scene

Task 5 — Text Rendering Pipeline
This will be a rough prototype text object for testing.
❌ Implement FreeType and Harfbuzz into the code
❌ Abstract text object creation, including position, color, and object update
❌ Paint the text object into the scene layer

Task 6 — Basic Interactive Text UI
❌ Create a scene with multiple text objects
❌ Create a basic selectable menu, each element highlighted by a color
❌ Create a scene for each menu element
Layout example:

1. Hello world (Some basic static text)
2. Debug info (Shows basic info like FPS and internal renderer resolution)
3. About (Displays build and version string)