feat: datetime tooltip to show full value

[wusteven815]

• Closes Full values of DateTimes should be more accessible #614
• Adds tooltip for datetime cells showing full value

[codecov]

Codecov Report

Attention: Patch coverage is 9.33333% with 68 lines in your changes missing coverage. Please review.

Project coverage is 46.61%. Comparing base (5ebc195) to head (a8ca90c).

Files with missing lines	Patch %	Lines
...id/src/mousehandlers/IrisGridTokenMouseHandler.tsx	8.47%	54 Missing ⚠️
packages/iris-grid/src/IrisGrid.tsx	25.00%	6 Missing ⚠️
...ckages/iris-grid/src/IrisGridTableModelTemplate.ts	0.00%	5 Missing ⚠️
packages/iris-grid/src/IrisGridModel.ts	0.00%	2 Missing ⚠️
...s/grid/src/mouse-handlers/GridTokenMouseHandler.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2286      +/-   ##
==========================================
+ Coverage   46.60%   46.61%   +0.01%     
==========================================
  Files         704      704              
  Lines       38963    38956       -7     
  Branches     9914     9730     -184     
==========================================
+ Hits        18158    18160       +2     
+ Misses      20794    20785       -9     
  Partials       11       11              

Flag	Coverage Δ
unit	46.61% <9.33%> (+0.01%)	⬆️

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Added

[bmingles]

Left a suggestion to simplify nested if / else structure

[bmingles]

LGTM