Turn on noUnusedLocals, noImplicitReturns, importsNotUsedAsValues: error, and isolatedModules (#2777)

src/renderer/navigation/page-param.ts

@@ -20,7 +20,7 @@
  */
 
 // Manage observable URL-param from document.location.search
-import { IObservableHistory } from "mobx-observable-history";
+import type { IObservableHistory } from "mobx-observable-history";
 
 export interface PageParamInit<V = any> {
   name: string;