Revise Punit's contracts

[tannerwelsh]

Revise Punit's goals to simplify and clarify. See commit list for more specific changes.

When this PR is merged, this task also needs to get done:

• Replace text in each corresponding goal issue to point to the contract file.

[tannerwelsh]

Yo @punitrathore! The other @GuildCrafts/librarians and I are working to improve our goal library, piece by piece.

The first step is for us to migrate the goals from their current home (as descriptions on GitHub issues) to files in this repository (specifically, in the contracts directory).

As we migrate them, however, we're also reviewing and revising the goals to make them more clear and concise. This often means updating the specs and/or quality rubric, and editing the description and context to do more, well, describing and contextualizing ;).

Long story short: I made some edits to your goals. Would you mind reviewing them? If they look OK to you, I'll go ahead and merge them.

Thanks!

[punitrathore]

@tannerwelsh This looks really really good! Thanks so much for the edits. I'm gonna use this as a model for future goals ;-) I'm merging this.

[tannerwelsh]

Thanks @punitrathore!