feat: options pre-processors

[ocervell]

Add way to specific an option pre-processor.

For instance, for the wordlist argument, we could have a pre-processor that takes an URL and downloads it locally, so that:

secator x ffuf http://localhost:8000/FUZZ -w https://raw.githubusercontent.com/danielmiessler/SecLists/master/Discovery/DNS/deepmagic.com-prefixes-top500.txt

First downloads the wordlist and then executes ffuf with the local wordlist.

or by name:

secator x ffuf http://localhost:8000/FUZZ -w deepmagic

would map to the config value:

# ~/.secator/config.yml
wordlists:
  files:
    deepmagic: https://raw.githubusercontent.com/danielmiessler/SecLists/master/Discovery/DNS/deepmagic.com-prefixes-top500.txt