create: modify cask template

[razvanazamfirei]

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change? improve docs for adding/updating casks/formula #16327
• Have you added an explanation of what your changes do and why you'd like us to include them?
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This PR does the following:

• Modifies the cask template used for the create command
• Rearranges the list of reasons for cask rejection to align with their observed frequency
• Adds livecheck and zap to the list of required stanzas
• Provides guidance for situations where a zap stanza is not necessary
• Updates the example casks in the documentation to include ones containing all required stanzas

Closes #16342.

[razvanazamfirei]

I would note that we currently don't include an explicit livecheck stanza for casks using the :Git strategy. I would argue that we modify the documentation regardless, and perhaps we can discuss whether we should use :Git explicitly and make it an audit.

[0xdevalias]

Some notes/suggestions/thoughts.

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This PR does the following:

• ..snip..
• Adds livecheck and zap to the list of required stanzas

When I reviewed the code, I think this may have only been done in the docs, but not actually enforced in any of the code through brew style / brew audit / similar?

[MikeMcQuaid]

Great work as usual, thanks @razvanazamfirei!

Noticed one tiny bit of pedantry I'm committing and then will auto-merge.

[MikeMcQuaid]

@0xdevalias please do not review any more PRs until you are a maintainer and focus on your own, thanks.