docs: update featrue intro

[yutingzhao1991]

修改一下特性描述。把对 Ant Design 友好改为灵活的主题定制能力，吸引非 antd 项目采用。

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Latest commit: 5fb49d0

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Name	Status	Preview	Comments	Updated (UTC)
ant-design-web3	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 1, 2024 9:51am

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.99%. Comparing base (7d32958) to head (5fb49d0).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1229   +/-   ##
=======================================
  Coverage   99.99%   99.99%           
=======================================
  Files         858      858           
  Lines       18295    18315   +20     
  Branches     1592     1615   +23     
=======================================
+ Hits        18294    18314   +20     
  Misses          1        1           

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