- Created new clock_time subsystem consolidating hwtimer/ktime/cputime
- Implemented clock_time device abstraction with ops structure
- Added high-resolution timer (hrtimer) implementation
- Created compatibility layers for legacy APIs
- Added comprehensive English and Chinese documentation
- Updated Kconfig to mark old subsystems as deprecated
Co-authored-by: BernardXiong <1241087+BernardXiong@users.noreply.github.com>