readtags: add --with-psuedo-tags option

[codecov[bot]]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (60ee1e4) 85.33% compared to head (6cd47db) 85.33%.

Files	Patch %	Lines
extra-cmds/readtags-cmd.c	66.66%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #3901 +/- ## ========================================== - Coverage 85.33% 85.33% -0.01% ========================================== Files 234 234 Lines 55964 55966 +2 ========================================== + Hits 47756 47757 +1 - Misses 8208 8209 +1 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.