fix(Divider): Matching divider Teams theme to redlines

[codepretty]

Matched divider styles for the Teams theme to the redlines. This includes updating colors, variable names, spacing.

In Teams theme, there are only 2 types of dividers

1. Default divider w/text

2. Primary, important divider w/text

[codecov]

Codecov Report

Merging #249 into master will not change coverage.
The diff coverage is n/a.

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##           master     #249   +/-   ##
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  Coverage   91.84%   91.84%           
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  Files          61       61           
  Lines        1042     1042           
  Branches      134      154   +20     
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  Hits          957      957           
  Misses         82       82           
  Partials        3        3

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[codecov]

Codecov Report

Merging #249 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #249   +/-   ##
=======================================
  Coverage   91.84%   91.84%           
=======================================
  Files          61       61           
  Lines        1042     1042           
  Branches      134      154   +20     
=======================================
  Hits          957      957           
  Misses         82       82           
  Partials        3        3

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #249 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #249   +/-   ##
=======================================
  Coverage   92.57%   92.57%           
=======================================
  Files          62       62           
  Lines        1131     1131           
  Branches      147      147           
=======================================
  Hits         1047     1047           
  Misses         81       81           
  Partials        3        3

---

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[mnajdova]

Little bit worried about not applying any height on the Divider, as currently we used it also as an invisible divider between elements. Please take a look into this visual regression: https://screener.io/v2/states/rkGqtccHX.stardust-ui-react/fix%2Fdivider-redlines/1024x768/Chrome/portalexampleshorthandtsx-0
Please reason for this and update the styles accordingly, if you think they should be changed.

[notandrew]

Maybe we add an optional buffer size between elements, but I'm not sure that we want a height set. That may make it harder to modify in the case where we want smaller spacers between objects.

[codepretty]

I don't think we want to be setting a height either, but for dividers in the Teams theme it's probably okay to have top/bottom spacing. At least for now until we see other use cases for it and then we can make spacing optional if that is needed.

So now we can at least have 2 dividers in succession that don't sit on top of each other...