Added complete call-seq documentation for thread suspension methods in
src/sleep.c:
## Core Methods:
### sleep:
- Suspends current thread for specified duration in seconds
- Supports floating point precision when MRB_NO_FLOAT is not defined
- Returns actual number of seconds slept (rounded)
- Cross-platform implementation (Windows Sleep vs Unix nanosleep)
- Comprehensive examples showing fractional second delays
### usleep:
- Suspends current thread for specified duration in microseconds
- Provides microsecond-level precision for short delays
- Integer-only parameter for precise timing control
- Returns 0 on successful completion
- Examples demonstrating millisecond and microsecond delays
Co-authored-by: Atlassian Rovo Dev
- `MRB_WITHOUT_FLOAT` => `MRB_NO_FLOAT`
- `MRB_USE_FLOAT` => `MRB_USE_FLOAT32`
The former is to use `USE_XXX` naming convention. The latter is to make
sure `float` is 32bit float and not floating point number in general.
* Method implementation functions made `static`.
* Function declaration style has been changed.
* Unnecessary header file `mrb_sleep.h` removed.
* Used `mrb_get_args()` instead of self parsing.
* Indentation kept untouched.
Yukihiro "Matz" Matsumoto