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

default/themed/rofi.rasi.tpl

@@ -0,0 +1,26 @@
+* {
+    background: {{ background }};
+    foreground: {{ foreground }};
+    active-background: {{ color2 }};
+    urgent-background: {{ color1 }};
+
+    normal-foreground: {{ color3 }};
+    normal-background: {{ background }};
+
+    selected-foreground: {{ selection_foreground }};
+    selected-background: {{ selection_background }};
+
+    seperator-color: {{ background }};
+    border-color: {{ color0 }};
+
+    prompt-color: {{ color4 }};
+    prompt-background-color: {{ color0 }};
+
+    window-border-size: 1px;
+    window-border-radius: 8px;
+
+    background-color: @background;
+    text-color: @foreground;
+}
+
+