Implement time normalization and timer duration normalization in SlotExtractor

- Added time format normalization for alarm times (730 pm -> 19:30, 5 30 am -> 05:30)
- Added timer duration normalization to seconds (5 mins -> 300, 6 hr -> 21600)
- Fixed space/dot separated time formats (10 30 am -> 10:30, 5.30 pm -> 17:30)
- Context-aware processing: alarms return HH:MM format, timers return seconds
- Comprehensive pattern matching for various time/duration formats
- Updated both Kotlin and Swift SlotExtractor implementations

Author: tanmaypawar-noise