[IMP] mail, *: move up model files

Move model definition files from `models/thing/thing.js` to
`models/thing.js` and remove the now empty intermediate directory.

Task-2759582
 * = calendar, crm_livechat, hr, im_livechat, mail_bot, sms, snailmail,
     website_livechat, website_slides

closes odoo/odoo#86464

Related: odoo/enterprise#25291
Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

addons/website_slides/__manifest__.py

@@ -70,7 +70,7 @@ Featuring
             'website_slides/static/src/scss/slide_views.scss',
             'website_slides/static/src/js/slide_category_one2many.js',
             'website_slides/static/src/js/rating_field_backend.js',
-            'website_slides/static/src/models/*/*.js',
+            'website_slides/static/src/models/*.js',
         ],
         'web.assets_frontend': [
             'website_slides/static/src/scss/website_slides.scss',

addons/website_slides/static/src/models/activity_view.js

@@ -2,7 +2,7 @@
 
 import { addRecordMethods } from '@mail/model/model_core';
 // ensure that the model definition is loaded before the patch
-import '@mail/models/activity_view/activity_view';
+import '@mail/models/activity_view';
 
 addRecordMethods('ActivityView', {
     /**