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/web/static/lib/odoo_ui_icons/style.css

@@ -0,0 +1,106 @@
+@font-face {
+  font-family: 'odoo_ui_icons';
+  src: url('fonts/odoo_ui_icons.woff2') format('woff2'), url('fonts/odoo_ui_icons.woff') format('woff');
+  font-weight: normal;
+  font-style: normal;
+  font-display: block;
+}
+
+.oi {
+  display: inline-block;
+  font-family: 'odoo_ui_icons' !important;
+  speak: never;
+  font-style: normal;
+  font-weight: normal;
+  font-variant: normal;
+  text-transform: none;
+  line-height: 1;
+
+  /* Better Font Rendering =========== */
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+.oi-view-pivot:before { content: '\e800'; }
+.oi-text-break:before { content: '\e801'; }
+.oi-text-inline:before { content: '\e802'; }
+.oi-voip:before { content: '\e803'; }
+.oi-odoo:before { content: '\e806'; }
+.oi-search:before { content: '\e808'; }
+.oi-group:before { content: '\e80a'; }
+.oi-settings-adjust:before { content: '\e80c'; }
+.oi-apps:before { content: '\e80d'; }
+.oi-panel-right:before { content: '\e810'; }
+.oi-launch:before { content: '\e812'; }
+.oi-studio:before { content: '\e813'; }
+.oi-view-kanban:before { content: '\e814'; }
+.oi-text-wrap:before { content: '\e815'; }
+.oi-view-cohort:before { content: '\e816'; }
+.oi-view-list:before { content: '\e817'; }
+.oi-gif-picker:before { content: '\e82e'; }
+.oi-chevron-down:before { content: '\e839'; }
+.oi-chevron-left:before { content: '\e83a'; }
+.oi-chevron-right:before { content: '\e83b'; }
+.oi-chevron-up:before { content: '\e83c'; }
+.oi-arrows-h:before { content: '\e83d'; }
+.oi-arrows-v:before { content: '\e83e'; }
+.oi-arrow-down-left:before { content: '\e83f'; }
+.oi-arrow-down-right:before { content: '\e840'; }
+.oi-arrow-down:before { content: '\e841'; }
+.oi-arrow-left:before { content: '\e842'; }
+.oi-arrow-right:before { content: '\e843'; }
+.oi-arrow-up-left:before { content: '\e844'; }
+.oi-arrow-up-right:before { content: '\e845'; }
+.oi-arrow-up:before { content: '\e846'; }
+.oi-draggable:before { content: '\e847'; }
+.oi-view:before { content: '\e861'; }
+.oi-archive:before { content: '\e862'; }
+.oi-unarchive:before { content: '\e863'; }
+.oi-text-effect:before { content: '\e827'; }
+.oi-smile-add:before { content: '\e84e'; }
+.oi-close:before { content: '\e852'; }
+.oi-food-delivery:before { content: '\e82a'; }
+.oi-schedule-today:before { content: '\e82c'; }
+.oi-schedule-tomorrow:before { content: '\e82d'; }
+.oi-schedule-later:before { content: '\e804'; }
+.oi-activity:before { content: '\e82f'; }
+.oi-activity-plus:before { content: '\e830'; }
+.oi-numpad:before { content: '\e833'; }
+.oi-transfer:before { content: '\e834'; }
+.oi-suitcase:before { content: '\e835'; }
+.oi-suitcase-plus:before { content: '\e832'; }
+.oi-merge:before { content: '\e836'; }
+.oi-record:before { content: '\e837'; }
+.oi-backspace-o:before { content: '\e838'; }
+.oi-user:before { content: '\e805'; }
+.oi-user-plus:before { content: '\e831'; }
+.oi-users:before { content: '\e807'; }
+.oi-ellipsis-h:before { content: '\e867'; }
+.oi-ellipsis-v:before { content: '\e868'; }
+.oi-plus:before { content: '\e809'; }
+.oi-minus:before { content: '\e80b'; }
+.oi-star-plus:before { content: '\e87c'; }
+.oi-subtitle:before { content: '\e80e'; }
+.oi-threads:before { content: '\e818'; }
+.oi-kickstarter:before { content: '\e819'; }
+.oi-x:before { content: '\e81a'; }
+.oi-x-square:before { content: '\e848'; }
+.oi-tiktok:before { content: '\e81b'; }
+.oi-bluesky:before { content: '\e81c'; }
+.oi-google-play:before { content: '\e81d'; }
+.oi-strava:before { content: '\e80f'; }
+.oi-discord:before { content: '\e811'; }
+
+/* RTL adaptations. */
+/* Flip directional icons by 180 degree. */
+/* ---------------------------------------------------------------------------- */
+.o_rtl .oi-chevron-left,
+.o_rtl .oi-chevron-right,
+.o_rtl .oi-arrow-down-left,
+.o_rtl .oi-arrow-down-right,
+.o_rtl .oi-arrow-left,
+.o_rtl .oi-arrow-right,
+.o_rtl .oi-arrow-up-left,
+.o_rtl .oi-arrow-up-right {
+  transform: rotate(180deg);
+}