deck file render canonical order

[mheap]

When deck file render runs, the output file is not deterministically ordered. This causes issues when customers run git diff.

We hit a similar problem internally with our openapi tooling (and solve it with https://github.com/thim81/openapi-format).

Acceptance Criteria

• Running deck file render multiple times results in the same output (checked by running cat output.yaml | sha246sum

[Tieske]

I think this should be a separate command; eg. deck file canonicalize, and possibly should be added as flags to any other command where it makes sense, eg. deck file xxxxxx --canonicalize or deck gateway dump --canonicalize.