fix: DH-19614: Add tree table formatting logic to tree model

[gzh2003]

Part of DH-19614. Fixes an issue with rollups where tree table aggregated constituents were not being rendered based on the original column type. This change ensures that leaf nodes in tree tables use the appropriate column type for formatting and alignment.

Changes:

• Added tree table specific overrides to IrisGridTreeTableModel:
  • Updated colorForCell to use column.constituentType instead of column,type for leaf node values
  • Updated textAlignForCell to use column.constituentType for leaf node values
• Added type guard isUITreeRow function in IrisGridTreeTableModel.ts

[codecov]

Codecov Report

Attention: Patch coverage is 92.42424% with 5 lines in your changes missing coverage. Please review.

Project coverage is 47.35%. Comparing base (9de971f) to head (dfd6828).
Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
...ckages/iris-grid/src/IrisGridTableModelTemplate.ts	0.00%	4 Missing ⚠️
packages/iris-grid/src/IrisGridTreeTableModel.ts	97.61%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2461      +/-   ##
==========================================
+ Coverage   47.31%   47.35%   +0.03%     
==========================================
  Files         723      727       +4     
  Lines       39772    39833      +61     
  Branches    10144     9975     -169     
==========================================
+ Hits        18819    18861      +42     
- Misses      20899    20961      +62     
+ Partials       54       11      -43     

Flag	Coverage Δ
unit	47.35% <92.42%> (+0.03%)	⬆️

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[mofojed]

Looks like a good start

[mofojed]

We'll want to add unit tests/e2e tests for that

[gzh2003]

We'll want to add unit tests/e2e tests for that

While working on the e2e tests, I discovered a separate formatting issue and created a new ticket for it: DH-19693.

Since this issue isn’t directly related to the color and alignment changes in the original ticket, I’m planning to wrap it up without the e2e tests for now. Then, once DH-19693 is resolved, I'll complete the e2e tests and submit them in a separate PR.

[mofojed]

Excellent work, good job filing DH-19693 as well.