Update add_label_to_malware.py

[Kaawasaaki]

Proposed changes

*Added CLI argument parsing using argparse

*Added duplicate checks for malware and labels

*Added logging for better debugging

*Improved maintainability and usability of the script

Checklist

• [x ] I consider the submitted work as finished
• I tested the code for its functionality
• [ x] I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• [x ] Where necessary I refactored code to improve the overall quality

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[labo-flg]

Thanks for your contribution.

We'd like to keep these examples scripts as light as possible, they are here to showcase precise actions made with the OCTI python client. In this case : create a malware, create a a label, add a label to the malware. Plain simple.

There is no need for such complexity, it's not in the scope of the examples scripts and add no real value regarding the usage of the library.