Saturation Boost – Java Healing

## Saturation Boost v1.0.1

### Achievement-Friendly Update

- Updated the add-on manifest to use the modern Bedrock Add-On metadata format.
- Added `metadata.product_type: "addon"` so the pack is treated as a regular Add-On on current Bedrock versions.
- Updated the minimum engine version to `1.26.52`.
- Updated the Script API dependency to `@minecraft/server` `2.1.0`.
- Rebuilt the `.mcaddon` and `.mcpack` packages cleanly.

### Gameplay

- No gameplay changes.
- The Java-style saturation regeneration mechanic is unchanged from the previous version.
- The script logic is identical to the original implementation.

### Compatibility

- Designed for Minecraft Bedrock `1.26.52+`.
- Tested in a Survival world with cheats and experiments disabled.
- Confirmed that achievements remain enabled while the mechanic still works.

### Notes

- This update focuses on keeping the add-on compatible with the newer Bedrock achievement-friendly Add-On behavior.