Eliminate Python dependency: embed frontend assets in odoo-go

- Copy all OWL frontend assets (JS/CSS/XML/fonts/images) into frontend/
  directory (2925 files, 43MB) — no more runtime reads from Python Odoo
- Replace OdooAddonsPath config with FrontendDir pointing to local frontend/
- Rewire bundle.go, static.go, templates.go, webclient.go to read from
  frontend/ instead of external Python Odoo addons directory
- Auto-detect frontend/ and build/ dirs relative to binary in main.go
- Delete obsolete Python helper scripts (tools/*.py)

The Go server is now fully self-contained: single binary + frontend/ folder.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/base/static/description/icon.svg

@@ -0,0 +1 @@
+<svg width="50" height="50" viewBox="0 0 50 50" xmlns="http://www.w3.org/2000/svg"><g clip-path="url(#o_icon_base_icon__a)"><path fill-rule="evenodd" clip-rule="evenodd" d="M4 38V13L25 0l21 13v25L25 50 4 38Zm2-1.16V15.294L24 25.58v21.545L6 36.84Zm20 10.285V25.58l18-10.285v21.544L26 47.125ZM6.943 13.53 25 23.848 43.057 13.53 25 2.352 6.943 13.53Z" fill="#1AD3BB"/></g><defs><clipPath id="o_icon_base_icon__a"><path fill="#fff" d="M0 0h50v50H0z"/></clipPath></defs></svg>