feat(select): removed dual placeholder logic from select

[Powerplex]

Select.Value placeholder prop has been removed

BREAKING CHANGE: prop removal - placeholder of Select.Value

TASK: #2314

Description, Motivation and Context

Having both placeholder prop on Select.Value and Select.Placeholder is confusing to consumers.

I removed the prop on Select.Value, but Select.Placeholder now manages hidden and disabled attributes to fine-tune placeholder behaviour like on a native HTML option.

Also, made the placeholder of Dropdown.Value optional.

Types of changes

• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 🧾 Documentation

Screenshots - Animations

Enregistrement.de.l.ecran.2024-07-29.a.12.21.47.mov

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.47%. Comparing base (d1f04c3) to head (9629c9c).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2329   +/-   ##
=======================================
  Coverage   96.47%   96.47%           
=======================================
  Files         493      493           
  Lines        4141     4142    +1     
  Branches     1342     1306   -36     
=======================================
+ Hits         3995     3996    +1     
  Misses        144      144           
  Partials        2        2           

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