Add cine reader

[ThijsIllimited]

Hi all,

We use a Phantom high-speed camera here in Twente, which records in Phantom's native .cine format. I have implemented .cine format support for VideoReader that I believe might be useful to others.

Implementation Details

• Optional Dependency: Integrates cine-reader as an optional dependency (extras_require={'cine': ['cine-handler']}).
• Lazy Loading: cine-reader is imported lazily inside VideoReader only when opening a file with a .cine extension. Non-.cine users will not be affected and do not need to install additional dependencies.
• Testing: Added test_get_frames_cine(), which uses pytest.importorskip("cine_reader") so the test suite skips cleanly if cine-reader is not installed on the test runner.
• Documentation: Updated README.md with instructions on installing pyidi[cine].

Let me know what you think, I will make updates accordingly.

Best regards,
Thijs

[jankoslavic]

@ThijsIllimited great PR. I have asked @itomac for review. @klemengit is do you confirm it?

[ThijsIllimited]

fyi made a small edit. It now sets keep_annotations to false for less I/O reads. Also, the recommended pip install was cine-handler not cine-reader