feat(codemod): improvements to s1-to-s2 codemod (agent mode, E2E tests, more)

[reidbarber]

Includes three main improvements to the npx @react-spectrum/codemods s1-to-s2 upgrade assistant:

1. Adds --agent mode: this just transforms files, skipping the wizard steps.
2. Adds E2E tests for CLI: Previously we just had snapshot tests for the transform functions. Now we have some tests for the CLI itself.
3. Fixes --components handling for sub-components: Previously, if you wanted to upgrade just TableView and ran npx @react-spectrum/codemods s1-to-s2 --components TableView, it would not update Cell, Column, Row, etc. Now, it includes all related components in the changes.

Other minor fixes:

• improved import cleanup
• convert render-function Item nodes in TabList to Tab
• remove dialog dividers after Dialog, Popover, and FullscreenDialog remaps
• Updated some outdated links to old docs

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

Check out the tests.

🧢 Your Project:

[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the S2 docs
• View the React Aria docs

[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the S2 docs
• View the React Aria docs