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/stock/static/tests/popover_widget.test.js

@@ -0,0 +1,35 @@
+import { defineMailModels } from "@mail/../tests/mail_test_helpers";
+import { expect, test } from "@odoo/hoot";
+import { contains, defineModels, fields, models, mountView } from "@web/../tests/web_test_helpers";
+
+class Partner extends models.Model {
+    json_data = fields.Char();
+
+    _records = [
+        {
+            id: 1,
+            json_data:
+                '{"color": "text-danger", "msg": "var that = self // why not?", "title": "JS Master"}',
+        },
+    ];
+}
+
+defineModels([Partner]);
+defineMailModels();
+
+test("Test creation/usage form popover widget", async () => {
+    await mountView({
+        type: "form",
+        resModel: "partner",
+        arch: `
+            <form>
+                <field name="json_data" widget="popover_widget"/>
+            </form>`,
+        resId: 1,
+    });
+    expect(".popover").toHaveCount(0);
+    expect(".fa-info-circle.text-danger").toHaveCount(1);
+    await contains(".fa-info-circle.text-danger").click();
+    expect(".popover").toHaveCount(1);
+    expect(".popover").toHaveText("JS Master\nvar that = self // why not?");
+});