Move Home Manager module defaults from a centralized `desktop-home-defaults.nix`
file into their respective `wisdom` slices. This change aligns with the
updated documentation regarding module ownership, where defaults live
with the option that owns them rather than in a shared defaults file.
Additionally, update `docs/conventions.md` to reflect this new pattern for
defining `mkEnableOption` defaults and move base git/encryption
configurations into the core `wisdom` module.
- Delete `modules/hosts/desktop-home-defaults.nix`
- Update `modules/wisdom/default.nix` to include shared git and package defaults
- Add `default = ...` to `mkEnableOption` in various `wisdom` modules
- Update `docs/conventions.md` with new HM slice guidelines
- Replaced legacy Obsidian snippet directory options with a unified `obsidianVaults` option for better management.
- Updated DMS configuration to streamline widget handling and removed deprecated options.
- Introduced new templates for Hyprland colors and Obsidian themes to improve user customization.
- Added scripts for SwiftShare upload functionality, enhancing screenshot capabilities within the DMS environment.
Olivier