docs: add missing community game docs

[koji-assistant]

Summary

• add missing community docs for Voxel Turf and Soulmask
• update the community games index so the community integrations referenced in Discord are visible
• add sync notes to Palworld, DayZ, Astroneer, and Eco pages where upstream docs/releases/modules can drift
• add images for the new Voxel Turf and Soulmask docs cards

Verification

• npm run build