Make Bedrock match java edition

Cushion Mechanics: Align Cushion block sitting hitboxes and interaction rules with Java so players can build secret doors, traps, and creative setups easily.
Consistent Redstone & Crafter: Make Bedrock Redstone timing deterministic (predictable) like Java. This ensures complex builds and Crafter auto-crafting work smoothly.
Nether Roof Building: Increase the build height limit on top of the Nether Roof (up to Y: 320) for farms and fast travel.
Full Off-Hand Usage: Allow holding food, torches, blocks, and tools in the off-hand, not just shields and rockets.
F3 Debug Screen: Add a Java-style F3 menu or UI toggle to view coordinates, facing direction, chunk borders, and light levels.
Parity & Bug Fixes: Fix Bedrock bugs while keeping its best features like high FPS, smooth cross-play, and movable tile entities.
Implementation: These features can be added via lightweight code updates and modular settings (e.g., Java Mechanics: ON/OFF) without affecting mobile performance or world sizes.