ENH: Add basic support for JBIG2 by using jbig2dec #6100

Job	Run time
Build & verify package	13s
Check code style issues	38s
pytest on windows	6m 2s
pytest on 3.8 (crypto-lib: cryptography)	6m 6s
pytest on 3.9 (crypto-lib: cryptography)	5m 40s
pytest on 3.10 (crypto-lib: cryptography)	5m 42s
pytest on 3.11 (crypto-lib: cryptography)	5m 13s
pytest on 3.12 (crypto-lib: cryptography)	6m 0s
pytest on 3.13 (crypto-lib: cryptography)	6m 0s
pytest on 3.8 (crypto-lib: pycryptodome)	5m 43s
pytest on 3.8 (crypto-lib: none)	5m 48s
Combine & check coverage.	0s
	53m 5s

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