08-19-25: Add deno.json support

[knotbin]

Is your feature request related to a problem? Please describe.
I can't use this because I use a deno.json instead of a package.json

Describe the solution you'd like
Add support for deno.json

Describe alternatives you've considered
Add support for custom file names/structures

Additional context
Add any other context or screenshots about the feature request here.

Please use the reactions to cast a vote in favor of or against this feature suggestion »

[coreybutler]

I'd accept a PR that adds support for this, but I don't have time to do this right now.