Add home page route and update navigation to use it

[julianbaker]

Summary

• Add a dedicated home page route and wire it into shared route utilities.
• Update web and mobile navigation, icons, and SSR/lineup helpers to recognize the new home entry point.
• Refresh home-page surfaces and related feed/profile/search components to work with the new home flow.

Testing

• Not run (not requested)

[changeset-bot]

⚠️ No Changeset found

Latest commit: e52fb35

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[github-actions]

🌐 Web preview ready

Preview URL: https://audius-web-preview-pr-14281.audius.workers.dev

Unique preview for this PR (deployed from this branch).
Workflow run