Introduce OpenAPI specs (#4351)

* wip

* wip

* wip

* Update index.ts

* Update gen-openapi-spec.ts

* Update api.ja-JP.md

* Fix

* Improve doc

* Update gen-openapi-spec.ts

* Update redoc.html

* Improve doc

* Update gen-openapi-spec.ts

* Improve doc

* Update CHANGELOG.md

src/server/api/endpoints/mute/create.ts

@@ -11,6 +11,8 @@ export const meta = {
 		'en-US': 'Mute a user'
 	},
 
+	tags: ['mute', 'users'],
+
 	requireCredential: true,
 
 	kind: 'account/write',

src/server/api/endpoints/mute/delete.ts

@@ -11,6 +11,8 @@ export const meta = {
 		'en-US': 'Unmute a user'
 	},
 
+	tags: ['mute', 'users'],
+
 	requireCredential: true,
 
 	kind: 'account/write',

src/server/api/endpoints/mute/list.ts

@@ -9,6 +9,8 @@ export const meta = {
 		'en-US': 'Get muted users.'
 	},
 
+	tags: ['mute', 'account'],
+
 	requireCredential: true,
 
 	kind: 'account/read',