[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_livechat/__manifest__.py

@@ -23,7 +23,7 @@ Allow website visitors to chat with the collaborators. This module also brings a
     'assets': {
         'mail.assets_discuss_public': [
             'website_livechat/static/src/components/*/*',
-            'website_livechat/static/src/models/*/*.js',
+            'website_livechat/static/src/models/*.js',
         ],
         'web.assets_frontend': [
             'mail/static/src/js/utils.js',
@@ -38,14 +38,14 @@ Allow website visitors to chat with the collaborators. This module also brings a
         'web.assets_backend': [
             'website_livechat/static/src/components/*/*.js',
             'website_livechat/static/src/components/*/*.scss',
-            'website_livechat/static/src/models/*/*.js',
+            'website_livechat/static/src/models/*.js',
         ],
         'web.assets_tests': [
             'website_livechat/static/tests/tours/**/*',
         ],
         'web.qunit_suite_tests': [
             'website_livechat/static/src/components/*/tests/*.js',
-            'website_livechat/static/src/models/*/tests/*.js',
+            'website_livechat/static/tests/*.js',
             'website_livechat/static/tests/helpers/*.js',
         ],
         'web.assets_qweb': [

addons/website_livechat/static/src/models/messaging_notification_handler.js

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

addons/website_livechat/static/src/models/thread.js

@@ -4,7 +4,7 @@ import { addFields, patchModelMethods } from '@mail/model/model_core';
 import { one } from '@mail/model/model_field';
 import { insert, unlink } from '@mail/model/model_field_command';
 // ensure that the model definition is loaded before the patch
-import '@mail/models/thread/thread';
+import '@mail/models/thread';
 
 patchModelMethods('Thread', {
     /**