feat: add Signing status for ConnectModal and update siwe docs

[yutingzhao1991]

close #1302

[changeset-bot]

🦋 Changeset detected

Latest commit: 3685bde

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
@ant-design/web3	Patch
@example/eth-web3js	Patch
@example/ethers-v5	Patch
@example/ethers	Patch

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Name	Status	Preview	Comments	Updated (UTC)
ant-design-web3	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 26, 2024 9:26am

[github-actions]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.99%. Comparing base (be3ca13) to head (3685bde).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1305   +/-   ##
=======================================
  Coverage   99.99%   99.99%           
=======================================
  Files         860      860           
  Lines       14813    14822    +9     
  Branches     1613     1616    +3     
=======================================
+ Hits        14812    14821    +9     
  Misses          1        1           

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