feat(components): support tree shaking (VIV-1672)

[RichardHelm]

Adds sideEffects property to package.json which allows bundlers to tree-shake unused components.
Example bundle with just button being used goes from 1.35 MiB to 95 KiB.

Vivid component code is itself is considered by bundlers to have side-effects, which is why it is not tree-shakable out of the box. This property allows bundlers to skip going into the component files in the first place, so they don't get included anymore.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (d61b119) to head (a17f54b).
Report is 1048 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##              main     #1875     +/-   ##
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  Coverage   100.00%   100.00%             
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  Files          123       341    +218     
  Lines         1562      6209   +4647     
  Branches       108       781    +673     
===========================================
+ Hits          1562      6209   +4647     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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[YonatanKra]

Nice work!