Add ArgumentParser to SAGE

[jzelenjak]

Description

Currently, parsing of the input arguments is happening manually, which is a bit cumbersome.

Furthermore, another optional parameter has to be added for the dataset name. This is needed because some if-checks in the code are CPTC-specific (see issue #24).

Proposed solution

1. Replace the manual parsing with ArgumentParser (similar to SECLEDS)
2. Add one more option: dataset_name (options = {"cptc", "other"}, default value = "other")
3. Optionally, add another optional parameter to not remove the dot files
4. Update the docker branch accordingly (only the new options have to be added to the script.sh and input.ini files, no other changes are necessary, i.e. the input.ini file remains only on the docker branch, spdfa-config.ini remains only on the main branch, argument parsing remains in the sage.py, with the exception that default values of optional parameters will be added to the script.sh file).
5. Update the documentation for the main and docker branches

[azqanadeem]

About point 3: Update the DOCKER flag value with the one parsed from the CMD arguments. The Default value of True(?) remains.