[ADD] website_event_exhibitor: add a module to handle sponsors and (online) exhibitors

RATIONALE

Events often have sponsors displayed on their front page. This should be
a real standalone feature of Online Event application. However currently it
cannot be used without tracks managements

PURPOSE

Purpose of this task is to allow to use and display sponsors on an Event front
page without using tracks. Moreover online and chat capabilities should be
part of a sponsor feature, located within website_event_exhibitor module.

SPECIFICATIONS

Create a void module ``website_event_exhibitor`` that will soon host

  * sponsor model from ``website_event_track``;
  * all exhibitor feature from ``website_event_track_exhibitor``;
  * without any dependency on tracks;

When installing website_event_exhibitor people will gain access to all features
related to sponsoring, from the simple cards to a complete jitsi-based chat
capability on frontend.

LINKS

Task ID-2326433
COM PR #61781
ENT pr odoo/enterprise#14752
UPG PR odoo/upgrade#1931

addons/website_event_exhibitor/__init__.py

@@ -0,0 +1,2 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.

addons/website_event_exhibitor/__manifest__.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+
+{
+    'name': 'Event Exhibitors',
+    'category': 'Marketing/Events',
+    'sequence': 1004,
+    'version': '1.0',
+    'summary': 'Event: manage sponsors and exhibitors',
+    'website': 'https://www.odoo.com/page/events',
+    'description': "",
+    'depends': [
+        'website_event',
+        'website_jitsi',
+    ],
+    'data': [
+    ],
+    'demo': [
+    ],
+    'application': False,
+    'installable': True,
+}