refactor: implement component-based architecture for enhanced maintainability

- Reorganize directory structure into core/, features/, and themes/
- Colocate application Nix logic, configs, scripts, and theme overrides
- Implement 'Inversion of Control' for theming: apps now pull theme-specific layouts
- Update flake.nix and shared library paths to match the new structure
- Document the new Feature-Centric architecture in README.md

themes/palettes/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"

themes/palettes/lumon/apps/chromium.theme

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+14,31,41

themes/palettes/lumon/apps/neovim.lua

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

themes/palettes/lumon/apps/swayosd.css

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+@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);
+}

themes/palettes/lumon/apps/vscode.json

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+{
+  "name": "Lumon",
+  "extension": "oldjobobo.lumon-theme"
+}

themes/palettes/lumon/colors.toml

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+# Accent and UI colors
+accent = "#f2fcff"
+active_border_color = "#f2fcff"
+active_tab_background = "#6fb8e3"
+
+# Cursor colors
+cursor = "#f2fcff"
+
+# Primary colors
+foreground = "#d6e2ee"
+background = "#16242d"
+
+# Selection colors
+selection_foreground = "#1b2d40"
+selection_background = "#4d9ed3"
+
+# Normal colors (ANSI 0-7)
+color0  = "#1b2d40"
+color1  = "#4d86b0"
+color2  = "#5e95bc"
+color3  = "#6fa4c9"
+color4  = "#6fb8e3"
+color5  = "#8bc9eb"
+color6  = "#b4e4f6"
+color7  = "#d6e2ee"
+
+# Bright colors (ANSI 8-15)
+color8  = "#304860"
+color9  = "#73a6cb"
+color10 = "#86b7d8"
+color11 = "#9dcae5"
+color12 = "#f2fcff"
+color13 = "#b1d8ee"
+color14 = "#d1eef8"
+color15 = "#ffffff"

themes/palettes/lumon/icons.theme

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+Yaru-blue