[MM-53102] Add support for multi-word highlights without notifications in web (#24050)

- Adds a new section under settings/notifications for adding custom multi-word keywords that get highlighted without notification
- Adds a new classname for highlighting words although the styling is the same as mentions highlights
- Added a few components to the ReduxFromProps pattern
- Adds supported type for the hook of PluginComponent type
- Add upsell for highlight without notification
- Moved 'setting_item.tsx' to the components folder
- Improved prop names and function structure for setting_item, setting_item_max and setting_item_min
- Moved 'toggle_modal_button.tsx' to the components folder
- Removed t and utility messages from a few components
- Fixed bug where the tooltip was not getting rendered on restrictedButtons
- Improved the mobile view of the settings modal
- Adds E2E for the feature

e2e-tests/cypress/tests/integration/channels/accessibility/accessibility_account_settings_spec.js

@@ -34,8 +34,8 @@ describe('Verify Accessibility Support in different sections in Settings and Pro
             {key: 'desktop', label: 'Desktop Notifications', type: 'radio'},
             {key: 'email', label: 'Email Notifications', type: 'radio'},
             {key: 'push', label: 'Mobile Push Notifications', type: 'radio'},
-            {key: 'keysWithNotification', label: 'Keywords that trigger Notifications', type: 'checkbox'},
-            {key: 'comments', label: 'Reply notifications', type: 'radio'},
+            {key: 'keysWithNotification', label: 'Keywords That Trigger Notifications', type: 'checkbox'},
+            {key: 'comments', label: 'Reply Notifications', type: 'radio'},
         ],
         display: [
             {key: 'theme', label: 'Theme', type: 'radio'},