Change screen name of SignIn route to "Home"

[jasperhuangg]

Details

See issue for more context.

Fixed Issues

$ https://github.com/Expensify/Expensify/issues/161155

Tests

• Verified that for an unauthenticated account, the SignIn page is still the first thing that loads (and that there are no issues when rendering the component.
• Verified that you can sign in and that you're taken to the chat hoe
• Verified that you can sign out and that you're taken back to the sign in page.
• Verified that the flow for validating a secondary login still works.

QA Steps

1. Sign out of any accounts. On mobile/desktop, simply open the app. On web, navigate to the root URL.
2. Verify that sign in page renders.
3. Verify that you can log in and that it redirects you to the chat home.
4. Verify that you can sign out and that it redirects you back to the sign in page.
5. Validate a secondary login and verify that the validation link works as expected (see QA steps for https://github.com/Expensify/Web-Expensify/pull/30615 for additional details).

Tested On

• Web
• Mobile Web
• Desktop
• iOS
• Android

Screenshots

Web

Mobile Web

Desktop

iOS

Android

cc @NikkiWines

[jasperhuangg]

Hey @NikkiWines! Do you mind verifying/providing context about Marc's comment here:
https://github.com/Expensify/Expensify/issues/161155#issuecomment-823737808

Thanks!

[marcaaron]

Looks good, but have a couple comments

[marcaaron]

@jasperhuangg let us know if this is ready for review by taking it out of draft mode, thanks.

[OSBotify]

✋ This PR was not deployed to staging yet because QA is ongoing. It will be automatically deployed to staging after the next production release.

[OSBotify]

🚀 Deployed to staging in version: 1.0.32-1🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅

[OSBotify]

🚀 Deployed to production in version: 1.0.39-5🚀

platform	result
🤖 android 🤖	failure ❌
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅