appbar out of sync check animating is finished

[JeffGreiner-eaton]

Fixes https://github.com/etn-ccis/blui-react-component-library/issues/736.

Changes proposed in this Pull Request:

• add hook to check animating is finished

Screenshots / Screen Recording (if applicable)

-

To Test:

• https://blui-react-docs--pr858-bug-blui-5306-sync-a-xoung6dm.web.app/components/app-bar/playground
• quickly scroll collapsible appbar referenced in issue

Any specific feedback you are looking for?

-

[codecov[bot]]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (f47f62b) 84.03% compared to head (cd31838) 83.93%.

Files	Patch %	Lines
components/src/core/AppBar/AppBar.tsx	60.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #858 +/- ## ========================================== - Coverage 84.03% 83.93% -0.10% ========================================== Files 58 58 Lines 1234 1239 +5 Branches 158 159 +1 ========================================== + Hits 1037 1040 +3 - Misses 98 100 +2 Partials 99 99 ``` | [Flag](https://app.codecov.io/gh/etn-ccis/blui-react-component-library/pull/858/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=etn-ccis) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/etn-ccis/blui-react-component-library/pull/858/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=etn-ccis) | `83.93% <60.00%> (-0.10%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=etn-ccis#carryforward-flags-in-the-pull-request-comment) to find out more.

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[github-actions[bot]]

Visit the preview URL for this PR (updated for commit cd31838):

https://blui-react-docs--pr858-bug-blui-5306-sync-a-xoung6dm.web.app

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[JeffGreiner-eaton]

I'll need to add some additional testing to appbar