added options to save/load/list settings as profiles

[santarl]

Added three new arguments to save/load/list settings as profiles

• -save [profile name]
  Add as last argument to save to a profile

• -load [profile name]
  Loads the profile if it exists

• -list
  Lists all the saved profiles in config directory
  config directory is "$HOME/.config/predator/saved profiles/"

[santarl]

@JafarAkhondali Could you take a look at this?

[JafarAkhondali]

Thanks @jayrfs (and sorry for delay). If you want to work more on the project I can give you access to merge

[santarl]

@JafarAkhondali that would be great. Thank you.

I'm thinking of working on GUI or atleast a TUI