[Information Architecture] Refactor to Fix Brand Tests

[BiswaViraj]

What changed? Why was the change needed?

• refactored the routes to fix the tests.

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[antonjoel82]

Looks good, thanks!

As discussed, we still have an issue with routing due to LaunchDarkly, but we'll approach this in a different PR. For now, it just causes an issue that we're able to load /brand when the flag is enabled

[antonjoel82]

Successful run: https://github.com/novuhq/novu/actions/runs/8972492917