doc: plugin config comments

packages/server/src/config/pluginConfig.ts

@@ -1,4 +1,4 @@
-import { IAppConfig } from '../types/appConfig';
+import { IAppConfig } from '../types/pluginConfig';
 import { engineList } from '@txtdot/plugins';
 import { compile } from 'html-to-text';
 

packages/server/src/types/pluginConfig.ts

@@ -3,6 +3,12 @@ import { Engine } from '@txtdot/sdk';
 type Html2TextConverter = (html: string) => string;
 
 export interface IAppConfig {
+  /**
+   * List of engines, ordered
+   */
   engines: Engine[];
+  /**
+   * HTML to text converter, if engine doesn't support text
+   */
   html2text?: Html2TextConverter;
 }