feat(addon-doc): ThemeSwitcher add new component

[waterplea]

Closes #

[lumberjack-bot]

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[github-actions]

Visit the preview URL for this PR (updated for commit 86e4444):

https://taiga-ui--pr7966-themes-0twpsv4q.web.app

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[bundlemon]

BundleMon

Files updated (3)

Status	Path	Size	Limits
✅	demo/browser/styles.(hash).css	13.02KB (+163B +1.24%)	+10%
✅	demo/browser/runtime.(hash).js	40.56KB (-18B -0.04%)	+10%
✅	demo/browser/main.(hash).js	277.01KB (-207B -0.07%)	+10%

Unchanged files (2)

Status	Path	Size	Limits
✅	demo/browser/vendor.(hash).js	236.35KB	+10%
✅	demo/browser/polyfills.(hash).js	11.21KB	+10%

Total files change -62B -0.01%

Groups updated (1)

Status	Path	Size	Limits
✅	demo/browser/*..js	6.53MB (-286B 0%)	-

Final result: ✅

View report in BundleMon website ➡️

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