Add various UI and system configuration parameters to dms-defaults,
including matugen contrast, widget styling, hyprland layout overrides,
elevation settings, battery indicator options, and workspace color
customizations. Also update plugin settings to include a Home Assistant
refresh counter.
- Introduced a new `justfile` for managing DMS-related tasks, including a recipe for syncing live DMS configuration.
- Added a `devshell.nix` file to set up a development environment with necessary packages and shell hooks for DMS.
- Updated DMS settings to replace `defaultSettingsFile` with `defaultSeedDir` for improved configuration management.
- Created a new script `sync-seed.sh` to facilitate syncing DMS settings from the live configuration to host-specific directories.
- Enhanced documentation and examples for DMS configuration and usage.