RGB blocks

Manual RGB Lighting Update

• Added server-synchronized AUTO and MANUAL RGB lighting modes.
• Added /rgb auto and /rgb manual commands.
• Added /rgb bake for applying recorded RGB lighting changes in MANUAL mode.
• Added /rgb setbake <4-256> for selecting a player-centered Bake radius.
• Added /rgb setbake all for processing all recorded dirty positions in the current dimension.
• Added /rgb get and /rgb bake get for displaying the current mode, Bake scope, and world ID.
• Added the RGB Light Switch item for toggling AUTO and MANUAL modes.
• Added the RGB Light Baker item for executing the currently configured Bake.
• Added a new RGB Tools creative tab containing both lighting control items.
• RGB Glow block and Chisels & Bits Glow bit changes are now recorded as persistent dirty positions while MANUAL mode is active.
• Bake requests now capture a fixed batch of dirty positions at the time the Bake begins.
• Changes made during an active Bake remain pending for the next Bake instead of extending the current batch.
• Dirty positions in unloaded chunks are preserved instead of being discarded.
• Switching from MANUAL back to AUTO now performs catch-up processing for loaded dirty positions.
• Added world-saved RGB mode, Bake scope, and world ID data.
• Added client-side, per-world and per-dimension persistence for RGB light sections.
• Added persistence for full-block RGB source positions.
• Added persistence for Chisels & Bits RGB source color and energy data.
• Added persistence for unbaked MANUAL dirty positions.
• Added backward-compatible loading of previous RGB lightmap formats and one-time source reconciliation.
• Reworked Chisels & Bits RGB source validation for newly created, changed, weakened, and removed Glow bits.
• Limited MANUAL Bake bootstrap and render rebuilding to sections associated with the selected dirty positions.