Initial commit: one_os_compositor_shell Odoo 20 addon — full-screen desktop shell UI

Includes:
- CompositorShell OWL component (ir.actions.client, target=fullscreen)
- App launcher grid (purple 1B Space accent, hover animations)
- Taskbar showing running apps
- Window decorations (close button)
- Top bar with session UUID display
- Loading overlay + error handling
- Modern SCSS with backdrop blur, gradients, dark theme
- Depends on one_os_compositor (parent addon)

Author: 1bspace.com
Parent company: 1B Global
License: Proprietary (1B Space internal use)

controllers/main.py

@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+"""Compositor Shell — minimal placeholder controller.
+
+The actual shell is a full OWL component registered via `ir.actions.client`
+in `one_os_compositor` (the parent addon). This module is reserved for any
+shell-specific HTTP routes we might add later (e.g. asset bundle routes).
+"""