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/tokyo-night/apps/btop.theme

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+# Theme: tokyo-night
+# By: Pascal Jaeger
+
+# Main bg
+theme[main_bg]="#1a1b26"
+
+# Main text color
+theme[main_fg]="#cfc9c2"
+
+# Title color for boxes
+theme[title]="#cfc9c2"
+
+# Highlight color for keyboard shortcuts
+theme[hi_fg]="#7dcfff"
+
+# Background color of selected item in processes box
+theme[selected_bg]="#414868"
+
+# Foreground color of selected item in processes box
+theme[selected_fg]="#cfc9c2"
+
+# Color of inactive/disabled text
+theme[inactive_fg]="#565f89"
+
+# Misc colors for processes box including mini cpu graphs, details memory graph and details status text
+theme[proc_misc]="#7dcfff"
+
+# Cpu box outline color
+theme[cpu_box]="#565f89"
+
+# Memory/disks box outline color
+theme[mem_box]="#565f89"
+
+# Net up/down box outline color
+theme[net_box]="#565f89"
+
+# Processes box outline color
+theme[proc_box]="#565f89"
+
+# Box divider line and small boxes line color
+theme[div_line]="#565f89"
+
+# Temperature graph colors
+theme[temp_start]="#9ece6a"
+theme[temp_mid]="#e0af68"
+theme[temp_end]="#f7768e"
+
+# CPU graph colors
+theme[cpu_start]="#9ece6a"
+theme[cpu_mid]="#e0af68"
+theme[cpu_end]="#f7768e"
+
+# Mem/Disk free meter
+theme[free_start]="#9ece6a"
+theme[free_mid]="#e0af68"
+theme[free_end]="#f7768e"
+
+# Mem/Disk cached meter
+theme[cached_start]="#9ece6a"
+theme[cached_mid]="#e0af68"
+theme[cached_end]="#f7768e"
+
+# Mem/Disk available meter
+theme[available_start]="#9ece6a"
+theme[available_mid]="#e0af68"
+theme[available_end]="#f7768e"
+
+# Mem/Disk used meter
+theme[used_start]="#9ece6a"
+theme[used_mid]="#e0af68"
+theme[used_end]="#f7768e"
+
+# Download graph colors
+theme[download_start]="#9ece6a"
+theme[download_mid]="#e0af68"
+theme[download_end]="#f7768e"
+
+# Upload graph colors
+theme[upload_start]="#9ece6a"
+theme[upload_mid]="#e0af68"
+theme[upload_end]="#f7768e"
+

themes/palettes/tokyo-night/apps/keyboard.rgb

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+ff00ff

themes/palettes/tokyo-night/apps/neovim.lua

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+return {
+	{
+		"folke/tokyonight.nvim",
+		priority = 1000,
+	},
+	{
+		"LazyVim/LazyVim",
+		opts = {
+			colorscheme = "tokyonight-night",
+		},
+	},
+}

themes/palettes/tokyo-night/apps/vscode.json

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+{
+  "name": "Tokyo Night",
+  "extension": "enkia.tokyo-night"
+}