[MIG] web_timeline: Migration to 17.0

- Convert Moment.js to Luxon.
- Replace Underscore.js with native JavaScript code.
- Migrate legacy views to the new system and add an architecture parser to separate logic.
- added basic test

web_timeline/models/__init__.py

@@ -2,3 +2,4 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
 from . import ir_ui_view
+from . import ir_action