Is your feature request related to a problem? Please describe.

I first installed chezmoi using guix, and its build shows version "dev". i.e.

$ chezmoi --version
chezmoi version dev

It was mentioned on the installation guide so I assumed this would be a recent version. Turns out guix show chezmoi shows 1.8.1.

IMO it would be a good idea to remove guix since it is unmaintained, or at least link to/ use data from https://repology.org/project/chezmoi/versions to help inform people of which package manager they may wish to avoid.

I then built it locally from git, and found it also shows "dev" as the version.

Describe the solution you'd like

At least for git builds, which are easy to detect, it would be good to have the version number + sha, i.e. v2.20.0+892c584

Describe alternatives you've considered

Another pattern which is common is the most recent tag name followed by the number of commits since that tag, i.e. v2.20.0-NEXT.20