feat: Add clear method to MultiSpinner fix #35

[Arteiii]

• Introduced the clear method to set the number of rows to clear in the terminal before starting the animation
  • The method accepts an Option<u16>, allowing for optional specification of rows to clear
  • If None is passed, no clearing is performed, which might result in overwriting old content
  • Updated documentation

[github-actions[bot]]

Test Results

195 tests   163 :white_check_mark:  0s :stopwatch:   2 suites    1 :zzz:   1 files     31 :x:

For more details on these failures, see this check.

Results for commit 6ca7b296.

:recycle: This comment has been updated with latest results.