refactor: major architectural restructure for theme-centric organization

Theme System:
- Move all theme app configs to apps/ subdirectory (20 themes)
- Add theme-loader.nix for dynamic theme config deployment
- Simplify stylix.nix to focus on base theming only

Override System:
- Add overrides.nix for file-based config overrides
- Add behavior-configs.nix for non-visual configuration
- Split hypr/nomarchy.conf into behavior vs visual sections

Module Improvements:
- Add lib.mkDefault to all customizable settings
- Add modules/lib/ with shared utilities and state schema
- Update all home and system modules for downstream overridability

Installer:
- New minimal TTY installer (installer/install.sh)
- Golden path: BTRFS + LUKS2 (disko-golden.nix)
- New installer-iso.nix for TTY-only installation
- Keep graphical installer as installerIsoGraphical option

Cleanup:
- Remove obsolete install.sh, disko-ext4.nix, install-nomarchy.sh
- Update live-iso.nix references
- Add .claude/ to .gitignore for local IDE settings

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

config/hypr/nomarchy.conf

@@ -1,18 +1,42 @@
 # Learn how to configure Hyprland: https://wiki.hyprland.org/Configuring/
 
-# Use defaults Nomarchy defaults (but don't edit these directly!)
-source = ~/.config/nomarchy/default/hypr/autostart.conf
+# ============================================================================
+# BEHAVIOR CONFIGS (keybindings, input, rules - non-visual)
+# ============================================================================
+# These are the Nomarchy defaults - don't edit these directly!
+
+# Environment variables
+source = ~/.config/nomarchy/default/hypr/envs.conf
+
+# Keybindings
 source = ~/.config/nomarchy/default/hypr/bindings/media.conf
 source = ~/.config/nomarchy/default/hypr/bindings/clipboard.conf
 source = ~/.config/nomarchy/default/hypr/bindings/tiling-v2.conf
 source = ~/.config/nomarchy/default/hypr/bindings/utilities.conf
-source = ~/.config/nomarchy/default/hypr/envs.conf
-source = ~/.config/nomarchy/default/hypr/looknfeel.conf
+
+# Input settings
 source = ~/.config/nomarchy/default/hypr/input.conf
+
+# Window rules and layout
 source = ~/.config/nomarchy/default/hypr/windows.conf
+
+# Autostart applications
+source = ~/.config/nomarchy/default/hypr/autostart.conf
+
+# Look and feel (animations, layout behavior)
+source = ~/.config/nomarchy/default/hypr/looknfeel.conf
+
+# ============================================================================
+# VISUAL CONFIGS (colors, theming)
+# ============================================================================
+# Theme colors - loaded from the currently active theme
 source = ~/.config/nomarchy/current/theme/hyprland.conf
 
-# Change your own setup in these files (and overwrite any settings from defaults!)
+# ============================================================================
+# USER OVERRIDES
+# ============================================================================
+# Your personal overrides - edit these files to customize Nomarchy!
+
 source = ~/.config/hypr/monitors.conf
 source = ~/.config/hypr/input.conf
 source = ~/.config/hypr/bindings.conf

config/nomarchy/default/hypr/colors.conf

@@ -0,0 +1,12 @@
+# Hyprland Color Configuration (Visual)
+# This file contains only color-related settings.
+# It's sourced AFTER theme colors are applied, allowing theme-specific overrides.
+
+# These are placeholder values - actual colors come from the active theme
+# via ~/.config/nomarchy/current/theme/hyprland.conf
+
+# Border colors (set by theme-loader based on active theme)
+# The theme's hyprland.conf will define $activeBorderColor and $inactiveBorderColor
+
+# Group bar colors (set by theme)
+# Themes can override group bar colors in their hyprland.conf