Allow specifying a different kathara.conf file

[tcaiazzi]

Discussed in KatharaFramework Discussions #339

Summary

As @chlohr pointed out in the linked discussion, it would be beneficial to allow users to specify a different kathara.conf file when executing a command. Currently, Kathara looks at ~/.config/kathara.conf, but in some cases, users may need to override this with a custom configuration.

Proposed Solution

• Add an option to specify a custom kathara.conf file to all commands.
• Ensure backward compatibility by defaulting to ~/.config/kathara.conf when no alternative file is provided.
• Update the documentation to reflect this new option.

[Skazza94]

@tcaiazzi I would suggest a variation of this feature. Instead of adding an extra parameter to each command, another solution is to check if the network scenario folder has a kathara.conf file inside. If so, all the commands use that configuration file when running in a specific folder. We should also add an INFO logging to the user (if another configuration file is used).

[tcaiazzi]

@Skazza94 I agree with you, your solution offers the same flexibility without requiring changing all commands.