[IMP] web: export SCALE_LABELS from calendar_controller.js

This commits exports the SCALE_LABELS list from the calendar_controller.js
file. This allows us to import and know the list of available scales from
other locations (Studio for example), and be updated with the supported
scales with their value and label.

Part-of: odoo/odoo#115799

addons/web/static/src/views/calendar/calendar_controller.js

@@ -15,7 +15,7 @@ import { CalendarQuickCreate } from "./quick_create/calendar_quick_create";
 
 import { Component, useState } from "@odoo/owl";
 
-const SCALE_LABELS = {
+export const SCALE_LABELS = {
     day: _lt("Day"),
     week: _lt("Week"),
     month: _lt("Month"),