perf: Improving UX of command line

[ipcjs]

1. Support overriding configurational properties in the command line.
2. The enexSources parameter supports a mixture of multiple files and folders.

For example:

npx -p yarle-evernote-to-md@latest yarle \
  --configFile ./config.json \
  --enexSources ./test-template.enex \
  --outputDir out-new \
  --no-skipWebClips

Relative to #618, #540, #464

[ipcjs]

@akosbalasko can you help me review the PR?

[ipcjs]

any update?

[ipcjs]

@akosbalasko Is there anything that needs to be improved in this PR?

[akosbalasko]

hi @ipcjs !

First of all, thanks for raising this PR, and apologies for this long silence from my side!

The PR itself looks fine, but could you please proof the correctness by adding some unit tests?

Thanks a lot!

[ipcjs]

I have added two unit test cases.👌

[bumper314]

I would like to have this feature, it would make testing much easier