Marchy

Add theming system with light/dark mode support and CSS variables

3

Resolves #441 Site will default to system setting, allowing for override which is stored in local storage. Replaces many hardcoded values with CSS variables for easier theming.

Resolves #234 Adds the ability to re-sort custom attributes with drag and drop within the admin panel. # Demo https://github.com/user-attachments/assets/8ffcfbf2-e10b-44d0-a007-3032e1bf0783