Allow skipping comments in source code

[remko]

🚀 Feature Proposal

Scanning now processes and tries to parse code in comments.
This means too many keys end up in the translation file, and scanning even fails on code that isn't used.

Provide an option to not scan comments for translation keys. (or don't do it at all, which is what I expected).

Motivation

Sometimes, commented out code contains translation calls. This code can e.g. be commented out temporarily. In this case, it doesn't make sense to translate these strings. Sometimes, the code in comments isn't even legal code, and still the parser tries to parse it.

[pi0neerpat]

Was looking for an answer and saw this has already been posted here #118

[gong9]

Yes, I recently mentioned a related PR
#248