Refresh image dimensions after quarter-turn rotations

[antonsoo]

Image.rotate90() updates native pixels but leaves the Python width and height unchanged. For a rectangular image, np.asarray(image) consequently returns the rotated pixels with the old shape.

Refresh the dimensions from the native image after rotating. Regressions cover rectangular and square images, signed/full turn counts, and repeated quarter turns.

A photograph-based array-to-semigraphics workflow matches NumPy rotation and a separately rendered reference console after the fix. Before, 20 of 54 configurations produced incorrect images and 30,720 differing console tiles; all 34 unaffected configurations remain identical.

Validation: 11 regressions fail before and all 28 pass after. The full native --no-window suite passes 309 tests with 95 rendering skips; applicable hooks and two-file Mypy pass. Tested on Linux/Python 3.12.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.08%. Comparing base (432932a) to head (86afe21).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #194   +/-   ##
=======================================
  Coverage   86.08%   86.08%           
=======================================
  Files          29       29           
  Lines        7589     7590    +1     
=======================================
+ Hits         6533     6534    +1     
  Misses       1056     1056           

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[HexDecimal]

I never gave the libtcod image port the scrutiny it deserved. It was a mistake for me to port it like this, and naturally I only tested rotation on a square image.

Thanks for fixing this.