feat: introduce ConverterProvider to control conversion behaviour #1890

Job	Run time
osv-scanner (core)	55s
Dry-run release	21s
Check editorconfig	7s
osv-scanner (isthmus-cli)	54s
Security validation	7s
Build Examples	3m 47s
osv-scanner (isthmus)	52s
Build and Test Java	4m 5s
Build Isthmus Native Image (ubuntu-latest)	7m 36s
Build Isthmus Native Image (macOS-latest)	13m 56s
	32m 40s

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