Add GVision OCR engine support [NOT MERGEABLE due to unclear licensing] #672

Job	Run time
Test Windows (windows-latest, 3.10)	5m 26s
Build sdist and wheels	16s
Test Windows (windows-latest, 3.12)	5m 14s
Test Windows (windows-latest, 3.11)	3m 25s
Test Windows (windows-latest, 3.13)	3m 47s
Test ubuntu-22.04 with Python 3.10	4m 47s
Test ubuntu-22.04 with Python 3.11	1s
Test ubuntu-22.04 with Python 3.12	36s
Test ubuntu-22.04 with Python 3.13	8m 16s
Test ubuntu-24.04 with Python 3.11	1s
Test macOS (macos-latest, 3.10)	1s
Test ubuntu-24.04 with Python 3.13	1s
Test ubuntu-24.04 with Python 3.10	5m 24s
Test ubuntu-24.04 with Python 3.12	8m 16s
Test macOS (macos-latest, 3.12)	16m 42s
Test macOS (macos-13, 3.10)	12m 5s
Test ubuntu-24.04 with Python pypy3.10	3m 48s
Test macOS (macos-13, 3.11)	4m 17s
Test macOS (macos-latest, 3.13)	3m 44s
Test macOS (macos-13, 3.12)	1s
Test macOS (macos-13, 3.13)	20m 17s
Test macOS (macos-latest, 3.11)	1s
Deploy artifacts to PyPI	0s
Build Alpine-based Docker images	0s
Build Ubuntu-based Docker image	0s
Create GitHub release	0s
	1h 46m 26s

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