test: expose camera geometry assertion failures

[RoboX2020]

Addresses the camera test part of #115. Remove all 11 bare except blocks in tests/test_camera.py and check actual geometry instead of hiding errors.

The old tests included a wrong single-point shape, row-oriented world points, a Line3 treated as a 3-vector, a nonexistent P() method, and a skipped move test with undefined variables. The rewritten checks cover:

• Focal-length and principal-point setters.
• Analytic pinhole projection for one and several points.
• Distortion parameter storage.
• Rays through the camera centre with known directions.
• Absolute and relative move results, without changing the original camera.
• Analytic calibration/extrinsic matrices and projection consistency.
• A separately constructed camera's pose independence.

No production code changes.

Validation on Python 3.11:

• Camera suite: 25 passed plus 2 subtests on OpenCV 4.12.0.88 and 5.0.0.93.
• Full OpenCV 5 suite: 960 passed, 96 skipped, 7 subtests passed.
• Seven targeted mutations fail the corresponding rewritten checks (ignored setter, bad projection, wrong ray origin, in-place move, zero projection matrix, lost distortion, shared pose).
• Changed file passes ruff and black.

Full suite on OpenCV 4 was not run. Other #115 files are separate.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics -11 complexity · 0 duplication

Metric	Results
Complexity	-11
Duplication	0

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