improve comparison tool

[kakoeh]

Currently the compare command accepts a list of pdx-files and a list of variants as input arguments.
It would be nice to have an optional input argument where a folder with multiple pdx files can be specified.

Idea:

• provide folder with multiple pdx files as argument
• load all pdx files in folder, sort them alphabetically, compare databases pairwise

When multiple pdx files are analyzed, a summary of all changes might be helpful

Idea:

• calculate metrics (number of added services, number of changed services, number of removed services, total number of services per ecu variant, ...)
• display metrics graphically

The results of the comparison are displayed in the terminal. For further use, a json export might be nice.

Idea:

• write results of comparison in json structure
• use links to refer to dignostic services / objects if changes have already been detected (e.g. in another ecu variant / diagnostic layer)

Katja Köhler <katja.koehler@mercedes-benz.com>, on behalf of MBition GmbH.
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