add Pen definition and update schemas

[codeKraken19]

Signed-off-by: codeKraken 160219759+codeKraken19@users.noreply.github.com

Notes for Reviewers

This PR fixes #

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[aabidsofi19]

Did you also update the schemas in meshery ?

[aabidsofi19]

Merging this , lets discuss about other drafts.

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