Tick with limit

[coder137]

• Added limit: Option<usize> to TickedAsyncExecutor::tick
• Added example to project README

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 97.26%. Comparing base (51d01f7) to head (6fa666d).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ticked_async_executor.rs	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #10      +/-   ##
==========================================
- Coverage   98.59%   97.26%   -1.34%     
==========================================
  Files           4        4              
  Lines          71       73       +2     
==========================================
+ Hits           70       71       +1     
- Misses          1        2       +1     

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