feat: DH-19683: Multi-select combobox component

[mofojed]

• WIP, picking up Germain's changes

[codecov]

Codecov Report

❌ Patch coverage is 1.46819% with 604 lines in your changes missing coverage. Please review.
✅ Project coverage is 49.35%. Comparing base (d76c08b) to head (625fce6).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...omponents/src/spectrum/multiSelect/MultiSelect.tsx	1.35%	146 Missing ⚠️
...src/spectrum/multiSelect/useMultiSelectKeyboard.ts	0.00%	120 Missing ⚠️
...mponents/src/spectrum/utils/useMultiPickerProps.ts	0.00%	101 Missing ⚠️
...ents/src/spectrum/multiSelect/multiSelectUtils.tsx	0.00%	76 Missing ⚠️
...ts/src/spectrum/multiSelect/useMultiSelectState.ts	0.00%	37 Missing ⚠️
...ectrum/multiSelect/useMultiSelectLoadingSpinner.ts	3.44%	28 Missing ⚠️
...ectrum/multiSelect/useMultiSelectScrollListener.ts	0.00%	24 Missing ⚠️
...ages/jsapi-components/src/spectrum/MultiSelect.tsx	0.00%	21 Missing ⚠️
...s/src/spectrum/multiSelect/useMultiSelectFilter.ts	0.00%	20 Missing ⚠️
...trum/multiSelect/useMultiSelectNormalizedProps.tsx	0.00%	17 Missing ⚠️
... and 4 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2671      +/-   ##
==========================================
- Coverage   49.76%   49.35%   -0.42%     
==========================================
  Files         774      787      +13     
  Lines       43945    44557     +612     
  Branches    11330    11334       +4     
==========================================
+ Hits        21871    21990     +119     
- Misses      22027    22548     +521     
+ Partials       47       19      -28     

Flag	Coverage Δ
unit	49.35% <1.46%> (-0.42%)	⬇️

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