Make flake self-contained - consolidate installer-replication

BREAKING CHANGE: Remove external dots-hyprland dependency

- Imported all essential configs from dots-hyprland/installer-replication
- Added complete configs/ directory with:
  - hypr/ - Hyprland configuration
  - quickshell/ - Quickshell widgets and config
  - applications/ - Application configurations
  - scripts/ - Utility scripts
  - matugen/ - Material You theming
- Updated flake.nix to use local ./configs instead of external repo
- Simplified update-flake script (removed external repo management)
- Updated README to reflect self-contained architecture
- All builds pass with local configurations

Benefits:
- No external repository dependencies
- Faster builds (no network dependencies)
- Version controlled configs in single repo
- Easier maintenance and development
- Complete installer replication in one place

configs/quickshell/scripts/cava/raw_output_config.txt

@@ -0,0 +1,17 @@
+[general]
+mode = waves
+framerate = 60
+autosens = 1
+bars = 50
+
+[output]
+method = raw
+raw_target = /dev/stdout
+data_format = ascii
+channels = mono
+mono_option = average
+
+[smoothing]
+noise_reduction = 20
+
+