WIP plugins: add theme support

shared/extra-utils/server/config.ts

@@ -59,6 +59,9 @@ function updateCustomSubConfig (url: string, token: string, newConfig: any) {
         css: 'body { background-color: red; }'
       }
     },
+    theme: {
+      default: 'default'
+    },
     services: {
       twitter: {
         username: '@MySuperUsername',

shared/models/server/custom-config.model.ts

@@ -15,6 +15,10 @@ export interface CustomConfig {
     }
   }
 
+  theme: {
+    default: string
+  }
+
   services: {
     twitter: {
       username: string

shared/models/server/server-config.model.ts

@@ -24,7 +24,14 @@ export interface ServerConfig {
     }
   }
 
-  plugins: ServerConfigPlugin[]
+  plugin: {
+    registered: ServerConfigPlugin[]
+  }
+
+  theme: {
+    registered: ServerConfigPlugin[]
+    default: string
+  }
 
   email: {
     enabled: boolean

shared/models/users/user-update-me.model.ts

@@ -13,4 +13,6 @@ export interface UserUpdateMe {
   email?: string
   currentPassword?: string
   password?: string
+
+  theme?: string
 }