Add Hook to the policy Input for enrichment

[mostafa]

Ticket(s)

• Part of Enrich policy input gatewayd#462

Description

This adds all the information related to a hook function including name, priority, input parameters and output result. This enables policies to access this information for all sorts of constraint checks.

Related PRs

N/A

Development Checklist

• I have added a descriptive title to this PR.
• I have squashed related commits together.
• I have rebased my branch on top of the latest main branch.
• I have performed a self-review of my own code.
• I have commented on my code, particularly in hard-to-understand areas.
• I have added docstring(s) and type annotations to my code.
• I have made corresponding changes to the documentation (docs).
• I have added tests for my changes.

Legal Checklist

• I have read the CONTRIBUTING document.
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