Tag follow (#12041)

* feat: tag follow

* on tag delete remove it from following users

* feat: on tag rename update user followed tags

and move the

* add new filter on /notifications

* feat: openapi updates

* chore: up themes

* chore: up peace

* refactor: remove unused title

src/api/index.js

@@ -5,11 +5,11 @@ module.exports = {
 	users: require('./users'),
 	groups: require('./groups'),
 	topics: require('./topics'),
+	tags: require('./tags'),
 	posts: require('./posts'),
 	chats: require('./chats'),
 	categories: require('./categories'),
 	flags: require('./flags'),
 	files: require('./files'),
-
 	utils: require('./utils'),
 };

src/api/tags.js

@@ -0,0 +1,13 @@
+'use strict';
+
+const topics = require('../topics');
+
+const tagsAPI = module.exports;
+
+tagsAPI.follow = async function (caller, data) {
+	await topics.followTag(data.tag, caller.uid);
+};
+
+tagsAPI.unfollow = async function (caller, data) {
+	await topics.unfollowTag(data.tag, caller.uid);
+};