fix: DH-23176: Better Error Handling for Conditional Formatting

[dgodinez-dh]

• adds conditional formats and preview to IrisGrid rollback
• displays and error message in the Conditional Format UI for failed formats

[codecov]

Codecov Report

❌ Patch coverage is 60.00000% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 51.21%. Comparing base (29750de) to head (a7ac56d).

Files with missing lines	Patch %	Lines
packages/iris-grid/src/IrisGrid.tsx	30.00%	7 Missing ⚠️
...conditional-formatting/ConditionalFormatEditor.tsx	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2731      +/-   ##
==========================================
- Coverage   51.40%   51.21%   -0.19%     
==========================================
  Files         796      796              
  Lines       45847    45855       +8     
  Branches    11719    11725       +6     
==========================================
- Hits        23566    23485      -81     
- Misses      22262    22351      +89     
  Partials       19       19              

Flag	Coverage Δ
unit	51.21% <60.00%> (-0.19%)	⬇️

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