change unknown file preview to readable format

types/index.d.ts

@@ -0,0 +1,15 @@
+export type OdFileObject = {
+  '@microsoft.graph.downloadUrl': string
+  name: string
+  size: number
+  id: string
+  lastModifiedDateTime: string
+  file: {
+    mimeType: string
+    hashes: {
+      quickXorHash: string
+      sha1Hash: string
+      sha256Hash: string
+    }
+  }
+}