Script API: Native Custom HUD & Impact Frame Camera Triggers

The Problem: Creating RPGs, combat overhauls, or minigames requires clear visual feedback. Currently, creators rely on brittle JSON-UI (hud_screen.json) overrides, actionbar font spam, or camera-shake hacks. These easily break across updates and cause severe visual jitter. Proposed Features: 1. Custom HUD API (@minecraft/server) Screen Anchoring: Attach text, icons, progress bars, and custom sprites to standard screen anchors (Top-Left, Hotbar, Center). Dynamic Property Updates: Native methods to update visibility, color, and percentage fill via scripts (e.g., updating mana/stamina bars). Non-Destructive Overlays: HUDs exist as independent layers to ensure multi-addon compatibility. 2. Impact Frames & Hit-Stop Triggers Hit-Stop / Frame Freeze: Brief rendering/tick pause (1–5 frames) on hit to give heavy swings real weight. Impact Frame VFX: Microsecond screen-flash overlays (high-contrast inversion, black/white flash, speed lines). Camera Punch: Scripted single-frame FOV shifts and directional camera jolts.