Add Mooncake extension rrules

[thorek1]

Summary

• add project weakdep and extension for Mooncake
• implement @from_rrule calls for all ChainRules-based rrules in a new extension

Testing

• Pkg.precompile()

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https://chatgpt.com/codex/tasks/task_e_68452e83aeec832f99f59d2a8027ece9

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.37%. Comparing base (3c070fd) to head (60b6eef).
Report is 3 commits behind head on rethink_parser.

Additional details and impacted files

@@                Coverage Diff                 @@
##           rethink_parser     #114      +/-   ##
==================================================
- Coverage           87.59%   83.37%   -4.23%     
==================================================
  Files                  18       18              
  Lines               10523    10557      +34     
==================================================
- Hits                 9218     8802     -416     
- Misses               1305     1755     +450     

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