* remove docs generator code from step-generator
* add docs generator to dedicated package
* add test cases
* add entry point for docs generation
* make output more readable
* read additional defaults
* add custo defaults parameters
* remove commented code
* adjust custom default parameter in workflow
* remove conflict leftovers
* handle custom default values
* remove comment
* extract code to function
* extract metadata reading to function
* do not print empty strings in favor of PIPER_* env vars
* extract new code to own metadata file
* only reset default on booleans
* remove obsolete test case
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