feat(desert-bus): various updates

[VodBox]

Description

• Adds day/night cycle
• Adds bus stops
• Adds custom DBfH shift banner posts
• Various code cleanup and restructuring
• Adds timezone setting to the testing preview

Time zone setting required the addition of luxon as a dependency.

Checklist:

• [x] I have read and followed the requirements in the Contributing document.
• [x] My code has been tested.
• [x] My commit title follows Conventional Commits formatting.
• [x] All the code is my own, or is code I have the rights to, and is being made available under the Apache License Version 2.0.