feat: add omarchy theme template system with management scripts

- New default/themed/ templates (alacritty, btop, foot, ghostty, helix,
  hyprland, hyprlock, kitty, mako, obsidian, rofi, swayosd, tmux,
  walker, waybar, keyboard.rgb, gum.env, etc.)
- Add omarchy-* theme management scripts (install, refresh, set, remove,
  update, bg-set, colors-from-alacritty, current, etc.)
- Add omarchy restart/hook scripts (btop, hyprctl, hypridle, mako, tmux)
- Add installer/environment.sh for shared env vars
- Add 19 theme directories with colors.toml, vscode.json, backgrounds,
  and app-specific configs (catppuccin, everforest, gruvbox, nord,
  tokyo-night, rose-pine, etc.)
- Update bing-wallpaper script to use new .config/omarchy path

themes/tokyo-night/colors.toml

@@ -0,0 +1,23 @@
+accent = "#7aa2f7"
+cursor = "#c0caf5"
+foreground = "#a9b1d6"
+background = "#1a1b26"
+selection_foreground = "#c0caf5"
+selection_background = "#7aa2f7"
+
+color0 = "#32344a"
+color1 = "#f7768e"
+color2 = "#9ece6a"
+color3 = "#e0af68"
+color4 = "#7aa2f7"
+color5 = "#ad8ee6"
+color6 = "#449dab"
+color7 = "#787c99"
+color8 = "#444b6a"
+color9 = "#ff7a93"
+color10 = "#b9f27c"
+color11 = "#ff9e64"
+color12 = "#7da6ff"
+color13 = "#bb9af7"
+color14 = "#0db9d7"
+color15 = "#acb0d0"

themes/tokyo-night/keyboard.rgb

@@ -0,0 +1 @@
+ff00ff

themes/tokyo-night/vscode.json

@@ -0,0 +1,4 @@
+{
+  "name": "Tokyo Night",
+  "extension": "enkia.tokyo-night"
+}