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/hr/static/tests/hr_test_helpers.js

@@ -0,0 +1,32 @@
+import { HrDepartment } from "@hr/../tests/mock_server/mock_models/hr_department";
+import { HrEmployee } from "@hr/../tests/mock_server/mock_models/hr_employee";
+import { HrEmployeePublic } from "@hr/../tests/mock_server/mock_models/hr_employee_public";
+import { M2xAvatarEmployee } from "@hr/../tests/mock_server/mock_models/m2x_avatar_employee";
+import { mailModels } from "@mail/../tests/mail_test_helpers";
+import { defineModels } from "@web/../tests/web_test_helpers";
+import { FakeUser } from "@hr/../tests/mock_server/mock_models/fake_user";
+import { HrVersion } from "./mock_server/mock_models/hr_version";
+import { HrJob } from "./mock_server/mock_models/hr_job";
+import { HrWorkLocation } from "./mock_server/mock_models/hr_work_location";
+import { ResourceResource } from "@resource/../tests/mock_server/mock_models/resource_resource";
+import { ResUsers } from "./mock_server/mock_models/res_users";
+import { ResPartner } from "./mock_server/mock_models/res_partner";
+
+export function defineHrModels() {
+    return defineModels(hrModels);
+}
+
+export const hrModels = {
+    ...mailModels,
+    M2xAvatarEmployee,
+    HrDepartment,
+    HrEmployee,
+    HrVersion,
+    HrEmployeePublic,
+    FakeUser,
+    HrJob,
+    HrWorkLocation,
+    ResourceResource,
+    ResUsers,
+    ResPartner,
+};