display library disk usage (#976)

enjoy/src/types/enjoy-app.d.ts

@@ -13,6 +13,7 @@ type EnjoyAppType = {
     createIssue: (title: string, body: string) => Promise<void>;
     onCmdOutput: (callback: (event, output: string) => void) => void;
     removeCmdOutputListeners: () => void;
+    diskUsage: () => Promise<DiskUsageType>;
     version: string;
   };
   window: {

enjoy/src/types/index.d.ts

@@ -183,3 +183,9 @@ type PlatformInfo = {
   arch: string;
   version: string;
 };
+
+type DiskUsageType = {
+  name: string;
+  path: string;
+  size: number;
+}[];