Construct to create Cedar Policy

[mrpackethead]

Description

Creation of a construct to create Cedar Policy, which is consumed by services such as verifiedAccess, and verifiedPermissions.
This could be something similar to the IAM constructs.

Roles

Role	User
Proposed by	@mrpackehead
Author(s)	@alias, @alias, @alias
API Bar Raiser	@alias
Stakeholders	@alias, @alias, @alias

See RFC Process for details

Workflow

• Tracking issue created (label: status/proposed)
• API bar raiser assigned (ping us at #aws-cdk-rfcs if needed)
• Kick off meeting
• RFC pull request submitted (label: status/review)
• Community reach out (via Slack and/or Twitter)
• API signed-off (label api-approved applied to pull request)
• Final comments period (label: status/final-comments-period)
• Approved and merged (label: status/approved)
• Execution plan submitted (label: status/planning)
• Plan approved and merged (label: status/implementing)
• Implementation complete (label: status/done)

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Author is responsible to progress the RFC according to this checklist, and
apply the relevant labels to this issue so that the RFC table in README gets
updated.

[awsmjs]

Closing this ticket. We believe the functionality is beneficial, but does not intersect with the core framework and should be vended and maintained separately.