Document the argument `--auto_rotate`

[alexdesiqueira]

In this PR, we:

• add documentation for the argument --auto_rotate in the README.
• add a shortcut to --auto_rotate, -ar.

[codecov-commenter]

Codecov Report

Merging #101 (9b4bf8d) into main (ab2026d) will decrease coverage by 10.56%. The diff coverage is n/a.

@@             Coverage Diff             @@
##             main     #101       +/-   ##
===========================================
- Coverage   81.72%   71.15%   -10.57%     
===========================================
  Files          19       10        -9     
  Lines         744      468      -276     
===========================================
- Hits          608      333      -275     
+ Misses        136      135        -1     

Impacted Files	Coverage Δ
mothra/tests/test_misc.py
mothra/tests/test_pipeline.py
mothra/tests/test_binarization.py
mothra/tests/test_plotting.py
mothra/tests/test_tracing.py
mothra/tests/test_preprocessing.py
mothra/tests/test_writing.py
mothra/tests/test_measurement.py
mothra/tests/test_ruler_detection.py

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update ab2026d...9b4bf8d. Read the comment docs.

[stefanv]

Thanks!