optimize(projects): supports custom menu icon sizes (#534)

src/typings/router.d.ts

@@ -42,6 +42,8 @@ declare module 'vue-router' {
      * In "src/assets/svg-icon", if it is set, the icon will be ignored
      */
     localIcon?: string;
+    /** Icon size. width and height are the same. */
+    iconFontSize?: number;
     /** Router order */
     order?: number | null;
     /** The outer link of the route */