Encoding is carried out using the UTF8 charset.
Returns a base64 encoded text.
If the parameter is not a valid text or a file, unknown is returned.
ToBase64(text)
ToBase64("SomeText or Other 1234")
=> "U29tZVRleHQgb3IgT3RoZXIgMTIzNA=="
ToBase64(file)
ToBase64([File Field])
=> "U29t... all-base64 chars to represent file ... IgT3RoZXI=="
