p4 tofino config added

[vaneshir]

Notebook added- Layer 2 Network with a P4 switch configured for basic packet forwarding

[review-notebook-app]

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[github-actions]

⚠️ This PR contains unsigned commits. To get your PR merged, please sign those commits (git rebase --exec 'git commit -S --amend --no-edit -n' @{upstream}) and force push them to this branch (git push --force-with-lease).

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[kthare10]

Looks good!