Feature request: File input as operation argument type

[j433866]

Summary

It could be useful to be able to input a file as an operation argument, which would enable us to have operations for file comparisons or combining files.

Example

An operation could be created to mimic the diff unix command.

[n1474335]

The text argument allows loading of files.

For example, you can drag a file over the Public Key argument here:
https://gchq.github.io/CyberChef/#recipe=RSA_Encrypt('-----BEGIN%20RSA%20PUBLIC%20KEY-----','RSA-OAEP','SHA-1')&input=YWJj