docs(toggles): add stories and document for toggles component

[tongchuliu]

add stories and document for toggles component

[vercel]

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🔍 Inspect: https://vercel.com/growingio/gio-design/557s3u8ok
✅ Preview: https://gio-design-git-fork-tongchuliu-toggles-stories.growingio.vercel.app

[codecov]

Codecov Report

Merging #764 (2151105) into master (5276c59) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #764   +/-   ##
=======================================
  Coverage   90.18%   90.18%           
=======================================
  Files         145      145           
  Lines        4939     4939           
  Branches     1305     1305           
=======================================
  Hits         4454     4454           
  Misses        479      479           
  Partials        6        6           

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