feat: cancel, pause and resume scheduled message

[Tochemey]

closes #740

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.01%. Comparing base (b7659b9) to head (3ce83be).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #741      +/-   ##
==========================================
+ Coverage   87.92%   88.01%   +0.09%     
==========================================
  Files         100      100              
  Lines        8611     8681      +70     
==========================================
+ Hits         7571     7641      +70     
+ Misses        819      818       -1     
- Partials      221      222       +1     

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