v1.8.0

Release v1.8.0 - Water Control & Scene Mode for prism-vacuum

Features:
- Water level control for mopping robots (tab switch between fan/water)
- Scene mode with 2 configurable scenes
- Supports select and number entities for water control
- Automatic level detection from entity attributes
- Visual Editor expanded with new options

Affected cards:
- prism-vacuum.js (enhanced)
- prism-vacuum-switchbot.js (unchanged, features now in standard card)