refactor: format and lint codebase (#971)

app/assets/javascripts/Components/Files/isFilePreviewable.ts

@@ -0,0 +1,12 @@
+export const isFileTypePreviewable = (fileType: string) => {
+  const isImage = fileType.startsWith('image/')
+  const isVideo = fileType.startsWith('video/')
+  const isAudio = fileType.startsWith('audio/')
+  const isPdf = fileType === 'application/pdf'
+
+  if (isImage || isVideo || isAudio || isPdf) {
+    return true
+  }
+
+  return false
+}