Semi-automatic dependency update with dependabot

[dallenng]

Hello, would you like a PR that setup dependabot on your devel branch for your repo ?

Context

Dependabot is a tool provided by Github to automatically create PR with dependency update. It can update Rust and Github Actions dependencies. That way you will be notified when an update is available.

Dependabot can run daily, weekly or monthly. I think weekly is great for this project to keep up with updates without running it too frequently.

What do you think ?