feat(agent): add logging capabilities

[goncalo-frade-iohk]

add a mediator handler
enhance public API

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ REPOSITORY	checkov	yes		no	13.64s
✅ REPOSITORY	dustilock	yes		no	0.01s
✅ REPOSITORY	git_diff	yes		no	0.08s
✅ REPOSITORY	secretlint	yes		no	2.42s
✅ REPOSITORY	syft	yes		no	1.31s

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[rodolfomiranda]

Looks good!