Add flag for full path to markdown file in log message

[andres-lowrie]

Let me start by saying thanks for this tool, really helpful.

I ran into this today

https://github.com/estruyf/doctor/blob/cb135f02db8ae1a097c74cf17928466920842d43/src/helpers/DoctorTranspiler.ts#L122

and wanted to mentioned that it would be useful to have a way to enable more verbosity in the log regarding markdown paths.

For example in my usecase we have a lot of files that have the same name (eg index.md) and using directories is how the site is organized; having the full path in the log message debugging would allow me to quickly see the offending file