Add Pill and MultiPill widgets

[philippjfr]

Implements #559

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.18%. Comparing base (72755fc) to head (a30eef3).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #568       +/-   ##
===========================================
+ Coverage   68.43%   81.18%   +12.75%     
===========================================
  Files          31       31               
  Lines        3152     3168       +16     
===========================================
+ Hits         2157     2572      +415     
+ Misses        995      596      -399     

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