Migrate dotfiles to Omarchy 4

Claude-Session: https://claude.ai/code/session_014ADhvRXuiTvrXSbConxUey

omarchy/extensions/omarchy-menu.jsonc

@@ -0,0 +1,10 @@
+{
+  // Blob entries added to the Quickshell Omarchy menu (Super + Space).
+  // These replace the walker/elephant menus used before Omarchy 4.
+
+  "blob": { "icon": "", "label": "Blob" },
+  "blob.wallpaper": { "icon": "", "label": "Wallpaper", "action": "blob_wallpaper --menu", "description": "Pick a wallpaper from ~/wallpapers" },
+  "blob.theme": { "icon": "", "label": "Theme", "action": "blob_theme --menu", "description": "Pick a local or Omarchy color theme" },
+  "blob.dynamic": { "icon": "", "label": "Dynamic theme", "action": "blob_theme --dynamic", "description": "Recolor from the current wallpaper" },
+  "blob.glass": { "icon": "", "label": "Toggle glass", "action": "blob_glass toggle", "checked": "test -f $HOME/.local/state/omarchy/toggles/hypr/blob-glass.lua" }
+}