[IMP] project: disable task resizing in planning view

In the fullcalendar library, you can by default resize events with the mouse
to alter the start and end dates. However, since for project tasks, we use
the calendar to show deadlines, it wouldn't make sense to resize them.

This commit therefore disables the ability to resize tasks.

Task-2741733

Part-of: odoo/odoo#86008

addons/project/static/src/js/project_calendar.js

@@ -1,6 +1,7 @@
 /** @odoo-module **/
 
 import CalendarController from 'web.CalendarController';
+import CalendarModel from 'web.CalendarModel';
 import CalendarView from 'web.CalendarView';
 import viewRegistry from 'web.view_registry';
 import { ProjectControlPanel } from '@project/js/project_control_panel';
@@ -18,10 +19,23 @@ const ProjectCalendarController = CalendarController.extend({
     },
 });
 
+const ProjectCalendarModel = CalendarModel.extend({
+    /**
+     * @private
+     * @override
+     */
+    _getFullCalendarOptions: function () {
+        const options = this._super(...arguments);
+        options.eventDurationEditable = false;
+        return options;
+    }
+})
+
 export const ProjectCalendarView = CalendarView.extend({
     config: Object.assign({}, CalendarView.prototype.config, {
         Controller: ProjectCalendarController,
         ControlPanel: ProjectControlPanel,
+        Model: ProjectCalendarModel,
     }),
 });