Print available "junit-platform.properties" with default values

[sormuras]

Print all available properties

The ConsoleLauncher should provide an option --print-default-properties. That would print all generic JUnit Platform-related and also all engine-specific options to stdout.

Sample output

##
## JUnit Platform
##

# Not applicable, yet.

##
## JUnit Jupiter
##

# Description, Link to User Guider and/or Javadoc
junit.jupiter.conditions.deactivate=...
# ...
junit.jupiter.execution.parallel.enabled=...
junit.jupiter.execution.parallel.mode.default=...
junit.jupiter.extensions.autodetection.enabled=...
junit.jupiter.testinstance.lifecycle.default=...

##
## JUnit Vintage
##  
...

##
## More properties from other test engines
##
...

[stale]

This issue has been automatically marked as stale because it has not had recent activity. Given the limited bandwidth of the team, it will be automatically closed if no further activity occurs. Thank you for your contribution.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. Given the limited bandwidth of the team, it will be automatically closed if no further activity occurs. Thank you for your contribution.

[stale]

This issue has been automatically closed due to inactivity. If you have a good use case for this feature, please feel free to reopen the issue.