feat: add web3auth signer to aa-signers

[avasisht23]

Pull Request Checklist

• Did you add new tests and confirm existing tests pass? (yarn test)
• Did you update relevant docs? (docs are found in the site folder, see guidleines below)
• Do your commits follow the Conventional Commits standard?
• Does your PR title also follow the Conventional Commits standard?
• If you have a breaking change, is it [correctly reflected in your commit message](https://www.conventionalcommits.org/en/v1.0.0/#examples? (e.g. feat!: breaking change)
• Did you run lint (yarn lint:check) and fix any issues? (yarn lint:fix)
• Is the base branch you're merging into development and not main?

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PR-Codex overview

This PR adds the Web3AuthSigner class to the @alchemy/aa-signers package, which allows users to authenticate and interact with Web3Auth wallets. It also includes the necessary dependencies and documentation updates.

Detailed summary

• Adds Web3AuthSigner class to @alchemy/aa-signers package
• Includes necessary dependencies (@web3auth/modal and @web3auth/base)
• Updates documentation for Web3AuthSigner methods: getAddress, signMessage, signTypedData, authenticate, getAuthDetails
• Adds example usage code snippets for each method in the documentation

The following files were skipped due to too many changes: site/packages/aa-signers/web3auth/getAuthDetails.md, site/packages/aa-signers/web3auth/introduction.md, site/packages/aa-signers/web3auth/authenticate.md, packages/signers/src/web3auth/__tests__/signer.test.ts, site/packages/aa-signers/web3auth/constructor.md, yarn.lock

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[avasisht23]

Current dependencies on/for this PR:

• development
  • PR feat!: extend SmartAccountSigner with authentication functionality #227
    • PR feat: add aa-signers package #228
      • PR feat: add magic signer to aa-signers #229
        • PR feat: add web3auth signer to aa-signers #247 👈

This stack of pull requests is managed by Graphite.

[moldy530]

there's a small bug in the docs, but LGTM otherwise

[avasisht23]

Merge activity

• Nov 28, 1:59 PM: @avasisht23 started a stack merge that includes this pull request via Graphite.
• Nov 28, 2:00 PM: Graphite rebased this pull request as part of a merge.
• Nov 28, 2:04 PM: @avasisht23 merged this pull request with Graphite.