UI: dock task panel right, remove non-Kindred themes

- Move ComboView default dock position from Left to Right
- Remove FreeCAD Classic, FreeCAD Light, FreeCAD Dark, and Dark behave
  theme packs, keeping only KindredCreate (Catppuccin Mocha)

README.md

@@ -137,6 +137,23 @@ The theme is automatically applied when using Kindred Create.
 
 Prebuilt packages for Linux are available on the [releases page](https://github.com/anthropics/create-0070/releases).
 
+#### Debian/Ubuntu (.deb)
+
+Download the `.deb` package from the releases page and install with:
+
+```bash
+sudo dpkg -i kindred-create_*.deb
+sudo apt-get install -f  # Install any missing dependencies
+```
+
+Or install directly with apt:
+
+```bash
+sudo apt install ./kindred-create_*.deb
+```
+
+After installation, launch Kindred Create from your application menu or run `kindred-create` from the terminal.
+
 ### Building from Source
 
 Kindred Create uses the same build system as FreeCAD. Build instructions for each platform: