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>

assets/themes/lumon/apps/btop.theme

@@ -0,0 +1,64 @@
+# Main background, empty for terminal default, need to be empty if you want transparent background
+theme[main_bg]=""
+theme_background=false
+
+# Main text color
+theme[main_fg]="#c7d2de"
+
+# Title color for boxes
+theme[title]="#9fcfe9"
+
+# Highlight color for keyboard shortcuts
+theme[hi_fg]="#b5deef"
+
+# Background color of selected item in processes box
+theme[selected_bg]="#355066"
+
+# Foreground color of selected item in processes box
+theme[selected_fg]="#c7d2de"
+
+# Color of inactive/disabled text
+theme[inactive_fg]="#355066"
+
+# Misc colors for processes box including mini cpu graphs, details memory graph and details status text
+theme[proc_misc]="#9fcfe9"
+
+# Box outline and divider line color
+theme[cpu_box]="#79abd2"
+theme[mem_box]="#79abd2"
+theme[net_box]="#79abd2"
+theme[proc_box]="#79abd2"
+theme[div_line]="#355066"
+
+# Gradient for all meters and graphs
+theme[temp_start]="#b5deef"
+theme[temp_mid]="#92c7e7"
+theme[temp_end]="#79abd2"
+
+theme[cpu_start]="#b5deef"
+theme[cpu_mid]="#92c7e7"
+theme[cpu_end]="#79abd2"
+
+theme[free_start]="#92c7e7"
+theme[free_mid]="#86b6da"
+theme[free_end]="#86b6da"
+
+theme[cached_start]="#86b6da"
+theme[cached_mid]="#86b6da"
+theme[cached_end]="#86b6da"
+
+theme[available_start]="#b5deef"
+theme[available_mid]="#b5deef"
+theme[available_end]="#b5deef"
+
+theme[used_start]="#79abd2"
+theme[used_mid]="#79abd2"
+theme[used_end]="#79abd2"
+
+theme[download_start]="#86b6da"
+theme[download_mid]="#b5deef"
+theme[download_end]="#92c7e7"
+
+theme[upload_start]="#86b6da"
+theme[upload_mid]="#b5deef"
+theme[upload_end]="#92c7e7"

assets/themes/lumon/apps/chromium.theme

@@ -0,0 +1 @@
+14,31,41

assets/themes/lumon/apps/hyprland.conf

@@ -0,0 +1,26 @@
+$activeBorderColor = rgb(f2fcff)
+$activeShadowColor = rgb(6fb8e3)
+$inactiveBorderColor = rgba(30486099)
+$inactiveShadowColor = rgba(30486077)
+
+general {
+    col.active_border = $activeBorderColor
+    col.inactive_border = $inactiveBorderColor
+    gaps_in = 8
+    gaps_out = 16
+}
+
+group {
+    col.border_active = $activeBorderColor
+    col.border_inactive = $inactiveBorderColor
+}
+
+decoration {
+    shadow {
+      enabled = true
+      range = 16
+      render_power = 4
+      color = $activeShadowColor
+      color_inactive = $inactiveShadowColor
+    }
+}

assets/themes/lumon/apps/neovim.lua

@@ -0,0 +1,13 @@
+return {
+  {
+    "omacom-io/lumon.nvim",
+    name = "lumon",
+    priority = 1000,
+  },
+  {
+    "LazyVim/LazyVim",
+    opts = {
+      colorscheme = "lumon",
+    },
+  },
+}

assets/themes/lumon/apps/swayosd.css

@@ -0,0 +1,44 @@
+@define-color background-color #1b2d40;
+@define-color border-color #304860;
+@define-color label #d6e2ee;
+@define-color image #d6e2ee;
+@define-color progress #6fb8e3;
+@define-color edge-light #f2fcff;
+
+/* Cancel out Nomarchy defaults */
+window:not(:backdrop),
+window:backdrop {
+    border: none;
+    border-width: 0;
+    background-color: transparent;
+    box-shadow: none;
+    padding: 12px;
+}
+
+/* Draw the Lumon OSD shell */
+window:not(:backdrop) #container,
+window:backdrop #container {
+    border: 2px solid alpha(@border-color, 0.92);
+    background-color: alpha(@background-color, 0.95);
+    padding: 12px 16px;
+    background-clip: padding-box;
+}
+
+image,
+label {
+    color: @label;
+}
+
+progressbar {
+    min-height: 8px;
+}
+
+progressbar trough {
+    background: alpha(@border-color, 0.24);
+    box-shadow: inset 0 1px rgba(242, 252, 255, 0.03);
+}
+
+progressbar progress {
+    background: linear-gradient(90deg, @progress, @edge-light);
+    box-shadow: 0 0 10px rgba(111, 184, 227, 0.18);
+}

assets/themes/lumon/apps/vscode.json

@@ -0,0 +1,4 @@
+{
+  "name": "Lumon",
+  "extension": "oldjobobo.lumon-theme"
+}

assets/themes/lumon/apps/waybar.css

@@ -0,0 +1,2 @@
+@define-color foreground #d6e2ee;
+@define-color background #213442;