feat(Flex): move styles to base theme

[kuzhelov]

This PR moves Flex and Flex.Item styles to base theme

[codecov]

Codecov Report

Merging #1206 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #1206   +/-   ##
=======================================
  Coverage   82.54%   82.54%           
=======================================
  Files         751      751           
  Lines        8850     8850           
  Branches     1246     1246           
=======================================
  Hits         7305     7305           
  Misses       1530     1530           
  Partials       15       15

Impacted Files	Coverage Δ
...ges/react/src/themes/base/components/Flex/utils.ts	33.33% <ø> (ø)
...eact/src/themes/base/components/Flex/flexStyles.ts	10% <ø> (ø)
packages/react/src/themes/teams/componentStyles.ts	100% <ø> (ø)	⬆️
.../src/themes/base/components/Flex/flexItemStyles.ts	16.66% <ø> (ø)
...c/themes/base/components/Flex/flexItemVariables.ts	100% <ø> (ø)
...t/src/themes/base/components/Flex/flexVariables.ts	100% <ø> (ø)
...kages/react/src/themes/teams/componentVariables.ts	100% <ø> (ø)	⬆️
...ckages/react/src/themes/base/componentVariables.ts	100% <100%> (ø)	⬆️
packages/react/src/themes/base/componentStyles.ts	100% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 2f73c9d...5729c75. Read the comment docs.

[codecov]

Codecov Report

Merging #1206 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #1206   +/-   ##
=======================================
  Coverage   82.56%   82.56%           
=======================================
  Files         752      752           
  Lines        8859     8859           
  Branches     1246     1178   -68     
=======================================
  Hits         7314     7314           
  Misses       1530     1530           
  Partials       15       15

Impacted Files	Coverage Δ
...ges/react/src/themes/base/components/Flex/utils.ts	33.33% <ø> (ø)
...eact/src/themes/base/components/Flex/flexStyles.ts	10% <ø> (ø)
packages/react/src/themes/teams/componentStyles.ts	100% <ø> (ø)	⬆️
...kages/react/src/themes/teams/componentVariables.ts	100% <ø> (ø)	⬆️
.../src/themes/base/components/Flex/flexItemStyles.ts	16.66% <ø> (ø)
...c/themes/base/components/Flex/flexItemVariables.ts	100% <ø> (ø)
...t/src/themes/base/components/Flex/flexVariables.ts	100% <ø> (ø)
...ckages/react/src/themes/base/componentVariables.ts	100% <100%> (ø)	⬆️
packages/react/src/themes/base/componentStyles.ts	100% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b85c3ab...5f0e96d. Read the comment docs.

[mnajdova]

Update the changelog please

[bmdalex]

👍