refactor(CellButton): mv mode to appearance

[inomdzhon]

• close [Feature][Cell Button]: Покрасить CellButton в Accent #7683

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• e2e-тесты
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Описание

см. #7683

Release notes

BREAKING CHANGE

• CellButton: свойство mode заменено на appearance со значениями 'accent' | 'neutral' | 'negative', также для appearance="accent" (a.k.a mode="primary") возвращён токен --vkui--color_text_accent, а вот при комбинации с centered применяется --vkui--color_text_accent_themed

  <CellButton
  -  mode="danger"
  +  appearance="negative"
  >
    Создать что-нибудь
  </CellButton>
  
  <CellButton
  -  mode="primary"
  +  appearance="accent"
  >
    Создать что-нибудь
  </CellButton>

[github-actions]

size-limit report 📦

Path	Size
JS	385.7 KB (+0.03% 🔺)
JS (gzip)	116.71 KB (+0.03% 🔺)
JS (brotli)	95.87 KB (-0.04% 🔽)
JS import Div (tree shaking)	1.46 KB (0%)
CSS	331.75 KB (+0.09% 🔺)
CSS (gzip)	41.58 KB (+0.06% 🔺)
CSS (brotli)	32.93 KB (-0.11% 🔽)

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[github-actions]

e2e tests

Playwright Report

[github-actions]

👀 Docs deployed

• ✅ Styleguide
• ✅ Storybook

Commit 0bc844a

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.15%. Comparing base (5459b15) to head (0bc844a).
Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7684      +/-   ##
==========================================
- Coverage   95.16%   95.15%   -0.02%     
==========================================
  Files         383      383              
  Lines       11335    11348      +13     
  Branches     3714     3719       +5     
==========================================
+ Hits        10787    10798      +11     
- Misses        548      550       +2     

Flag	Coverage Δ
unittests	95.15% <100.00%> (-0.02%)	⬇️

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[andrey-medvedev-vk]

👏

[qurle]

Спасибо за вашу работу