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/project/static/tests/project_task_project_many2one_field.test.js

@@ -0,0 +1,40 @@
+import { expect, test } from "@odoo/hoot";
+
+import { mountView } from "@web/../tests/web_test_helpers";
+
+import { defineProjectModels } from "./project_models";
+
+defineProjectModels();
+
+test("ProjectMany2one: project.task form view with private task", async () => {
+    await mountView({
+        resModel: "project.task",
+        resId: 3,
+        type: "form",
+        arch: `
+            <form>
+                <field name="name"/>
+                <field name="project_id" widget="project"/>
+            </form>
+        `,
+    });
+    expect("div[name='project_id'] .o_many2one").toHaveClass("o_many2one private_placeholder w-100");
+    expect("div[name='project_id'] .o_many2one input").toHaveAttribute("placeholder", "Private");
+});
+
+test("ProjectMany2one: project.task list view", async () => {
+    await mountView({
+        resModel: "project.task",
+        type: "list",
+        arch: `
+            <list>
+                <field name="name"/>
+                <field name="project_id" widget="project"/>
+            </list>
+        `,
+    });
+    expect("div[name='project_id']").toHaveCount(3);
+    expect("div[name='project_id'] .o_many2one").toHaveCount(2);
+    expect("div[name='project_id'] span.text-danger.fst-italic.text-muted").toHaveCount(1);
+    expect("div[name='project_id'] span.text-danger.fst-italic.text-muted").toHaveText("🔒 Private");
+});