1bd73d69fe
- keyframeGetValue now returns the last keyframe's value for times at or beyond it, fixes a missing util/math.h include, and asserts keyframes are sorted by time; adds test/animation/test_keyframe.c - Adds mainmenu scene/UI and a battle HUD UI frame - Adds save autosave-related fields and battle scene tweaks - Adds headless test coverage for cutscenes, entities, and map areas