Publish to snap store

[marcoieni]

Add to cd a job to automatically publish to the snap store.

• GitHub action that could be used on tag: https://github.com/samuelmeuli/action-snapcraft
• Instructions for creating a rust snap: https://snapcraft.io/docs/rust-applications

A question like "If this is a binary, would you like to create a snap?" should be asked when running cargo generate.