[ATL-1783] feat(castor): add castor open api package and dependencies

[goncalo-frade-iohk]

Fixes ATL-1783

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ REPOSITORY	checkov	yes		no	10.85s
✅ REPOSITORY	devskim	yes		no	0.9s
✅ REPOSITORY	dustilock	yes		no	0.03s
✅ REPOSITORY	gitleaks	yes		no	0.18s
✅ REPOSITORY	git_diff	yes		no	0.01s
✅ REPOSITORY	secretlint	yes		no	1.2s
✅ REPOSITORY	syft	yes		no	0.73s
✅ REPOSITORY	trivy	yes		no	3.22s

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