Add a debug option to the command line

[phatcher]

There are multiple ways of running GitVersion (command line, devops tool etc), and the behaviour can be non-obvious, it makes sense to optionally report this as part of the command line.

This makes it easier to debug issues such as #2094 where unexpectantly the config file has to be explicitly specified.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. After 30 days from now, it will be closed if no further activity occurs. Thank you for your contributions.

[asbjornu]

This is perhaps something we should consider for #2275.

[arturcic]

Agree

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This issue has been automatically marked as stale because it has not had recent activity. After 30 days from now, it will be closed if no further activity occurs. Thank you for your contributions.

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. After 30 days from now, it will be closed if no further activity occurs.