Function getFileType

getFileType(extension: string): string
Returns the type of a file based on its extension.
Parameters
- extension: string
  The file extension to check ('jpg'), or a file name or path ('photo.jpg', '/tmp/backup.tar.gz'). Only the text after the last . is used, and matching is case-insensitive.
Returns string
The type of the file (document, video, audio, archive, image, or unknown).
Example
```
getFileType('jpg') // returns 'image'
getFileType('report.PDF') // returns 'document'
```
- Defined in files/getFileType.ts:45