chore(docs): erc20 paymaster capability docs

[dancoombs]

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, and guidelines for updating/adding docs can be found in the contribution guide)
• 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? (e.g. feat!: breaking change)
• Did you run lint (yarn lint:check) and fix any issues? (yarn lint:write)
• Did you follow the contribution guidelines?

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PR-Codex overview

This PR focuses on restructuring the documentation for paying gas with any token, enhancing clarity on implementation steps, and updating API references for better user guidance.

Detailed summary

• Deleted docs/pages/transactions/pay-gas-with-any-token.mdx.
• Renamed pay-gas-with-any-token.mdx to pay-gas-with-any-token/index.mdx.
• Updated API references in api-postop.mdx and api-preop.mdx.
• Added detailed implementation steps in index.mdx.
• Included code examples in client.mdx, react.mdx, and api-preop.mdx.
• Enhanced prerequisites and advanced usage sections.

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[Copilot]

Pull Request Overview

This PR simplifies and restructures the documentation for the "Pay Gas With Any Token" feature, focusing on improving clarity and user experience. The changes emphasize the recommended post-operation mode while reorganizing content into a more logical flow.

• Restructured documentation with clearer sections and improved navigation
• Added dedicated API documentation files for post-operation and pre-operation modes
• Enhanced explanations of ERC-20 gas payment modes and their trade-offs

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
docs/pages/transactions/pay-gas-with-any-token/index.mdx	Main documentation restructure with improved sections, clearer explanations, and reorganized content flow
docs/pages/transactions/pay-gas-with-any-token/api-preop.mdx	Cleaned up to contain only pre-operation mode implementation details
docs/pages/transactions/pay-gas-with-any-token/api-postop.mdx	New file with post-operation mode API implementation examples
docs-site	Updated submodule commit reference

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[Copilot]

Pull Request Overview

Copilot reviewed 7 out of 8 changed files in this pull request and generated 5 comments.

[Copilot]

Pull Request Overview

Copilot reviewed 7 out of 8 changed files in this pull request and generated 9 comments.

[Copilot]

Pull Request Overview

Copilot reviewed 7 out of 8 changed files in this pull request and generated 2 comments.