dialects: (csl) add modules

[dk949]

• Added CslModuleOp to separate program from layout
• Added LayoutOp to specify the layout block
• Added traits to ensure ops are in correct module types.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.63%. Comparing base (e33522c) to head (144327c).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2602      +/-   ##
==========================================
- Coverage   89.65%   89.63%   -0.02%     
==========================================
  Files         358      358              
  Lines       45385    45475      +90     
  Branches     6832     6850      +18     
==========================================
+ Hits        40688    40763      +75     
- Misses       3666     3673       +7     
- Partials     1031     1039       +8     

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