Refactor Hyprland configuration to:
- Move Steam and Music from special workspaces to unique, named workspaces for better integration into the regular workflow.
- Update Waybar's workspace module to correctly display icons for these new named workspaces and filter them out from the special workspaces module.
- Implement a global blur effect for inactive windows, with a specific exception to keep Firefox windows fully opaque, enhancing focus on active content.
- Standardized apps/ directory by renaming all entry points (e.g., home.nix) to default.nix and updating imports to use directory paths.
- Consolidated system/ logic into modules/system/, eliminating the top-level system/ directory and redundant wrappers.
- Merged subsidiary utility scripts (e.g., hakase-popup.nix, switch-wallpaper.nix) into their parent default.nix files for better cohesion.
- Cleaned up unused files and updated all module references to reflect the new structure.
kenji