Detect sensitive file access

[timokoessler]

E.g. files accidentally served using a static middleware, like .env

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 97.08738% with 6 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...sitive-file-access/checkContextForSensitiveFile.ts	87.50%	6 Missing :warning:

:loudspeaker: Thoughts on this report? Let us know!

[bitterpanda63]

PR is backlogged for now due to higher priorities