[ATL-1787] feat(pollux): add pollux open api package and dependencies

[goncalo-frade-iohk]

Fixes ATL-1787

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ REPOSITORY	checkov	yes		no	12.13s
✅ REPOSITORY	devskim	yes		no	0.98s
✅ REPOSITORY	dustilock	yes		no	0.03s
✅ REPOSITORY	gitleaks	yes		no	0.2s
✅ REPOSITORY	git_diff	yes		no	0.0s
✅ REPOSITORY	secretlint	yes		no	1.28s
✅ REPOSITORY	syft	yes		no	0.6s
✅ REPOSITORY	trivy	yes		no	4.16s

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