feat: Add a Feed Form new conditional fields

[emmambd]

Summary:

Solves #1276 and #1277 by adding new questions and associated Cypress tests.

There was also a broken test according to the linter so I attempted to fix it based on Copilot — feel free to let me know this is totally wrong!

Expected behavior:
#1276 and #1277

Testing tips:

• See if the behavior outlined in Add a Feed form: ask for clarification when feed is not official #1276 and 1277 work on the Add a Feed Form
• I wasn't sure how to test the actual Google Sheet export...but these 3 new fields should be available in the Google Sheet when submitted

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• Run the unit tests with ./scripts/api-tests.sh to make sure you didn't break anything
• Add or update any needed documentation to the repo
• Format the title like "feat: [new feature short description]". Title must follow the Conventional Commit Specification(https://www.conventionalcommits.org/en/v1.0.0/).
• Linked all relevant issues
• Include screenshot(s) showing how this pull request works and fixes the issue(s)

[welcome]

Thanks for opening this pull request! You're awesome. We use semantic commit messages to streamline the release process. Before your pull request can be merged, you should update your pull request title to start with a semantic prefix. Examples of titles with semantic prefixes:

• fix: Bug with ssl network connections + Java module permissions.
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• docs: update RELEASE.md with new process
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[github-actions]

*Lighthouse ran on https://mobility-feeds-dev--pr-1283-fspvjzea.web.app/ * (Desktop)
⚡️ HTML Report Lighthouse report for the changes in this PR:

Performance	Accessibility	Best Practices	SEO
🟢 90	🟢 100	🟢 100	🟢 100

*Lighthouse ran on https://mobility-feeds-dev--pr-1283-fspvjzea.web.app/feeds * (Desktop)
⚡️ HTML Report Lighthouse report for the changes in this PR:

Performance	Accessibility	Best Practices	SEO
🟠 89	🟢 91	🟢 100	🟢 100

*Lighthouse ran on https://mobility-feeds-dev--pr-1283-fspvjzea.web.app/feeds/gtfs/mdb-2126 * (Desktop)
⚡️ HTML Report Lighthouse report for the changes in this PR:

Performance	Accessibility	Best Practices	SEO
🟠 87	🔴 0	🟢 96	🟢 100

*Lighthouse ran on https://mobility-feeds-dev--pr-1283-fspvjzea.web.app/feeds/gtfs_rt/mdb-2585 * (Desktop)
⚡️ HTML Report Lighthouse report for the changes in this PR:

Performance	Accessibility	Best Practices	SEO
🟢 93	🟠 88	🟢 100	🟢 100

*Lighthouse ran on https://mobility-feeds-dev--pr-1283-fspvjzea.web.app/gbfs/gbfs-flamingo_porirua * (Desktop)
⚡️ HTML Report Lighthouse report for the changes in this PR:

Performance	Accessibility	Best Practices	SEO
🟢 100	🟢 100	🟢 100	🟢 100

[github-actions]

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