feat(Toolbar): Add toolbarBehavior and toolbarItemBehavior

[sophieH29]

closes #1413

• improved buttonBehavior
• improved toggleButtonBehavior
• added toolbarItemBehavior

[codecov]

Codecov Report

Merging #1468 into master will decrease coverage by 0.02%.
The diff coverage is 68%.

@@            Coverage Diff            @@
##           master   #1468      +/-   ##
=========================================
- Coverage   73.23%   73.2%   -0.03%     
=========================================
  Files         822     823       +1     
  Lines        6198    6221      +23     
  Branches     1802    1805       +3     
=========================================
+ Hits         4539    4554      +15     
- Misses       1654    1662       +8     
  Partials        5       5

Impacted Files	Coverage Δ
packages/react/src/index.ts	100% <ø> (ø)	⬆️
packages/react/src/components/Button/Button.tsx	80% <0%> (-10.91%)	⬇️
...kages/react/src/components/Toolbar/ToolbarItem.tsx	73.91% <0%> (-11.09%)	⬇️
packages/react/src/components/Toolbar/Toolbar.tsx	89.47% <0%> (-10.53%)	⬇️
...ssibility/Behaviors/Button/toggleButtonBehavior.ts	100% <100%> (ø)	⬆️
...accessibility/Behaviors/Toolbar/toolbarBehavior.ts	100% <100%> (ø)
...ages/react/test/specs/behaviors/testDefinitions.ts	91.13% <100%> (+0.34%)	⬆️
...b/accessibility/Behaviors/Button/buttonBehavior.ts	100% <100%> (ø)	⬆️

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[DustyTheBot]

	Warnings
⚠️	There are no updates provided to CHANGELOG. Ensure there are no publicly visible changes introduced by this PR.

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