Usage lists arguments in the wrong order

[tekumara]

When providing a REV I get a revspec error:

❯ cargo install --git  https://github.com/gitext-rs/git-dive
    Updating git repository `https://github.com/gitext-rs/git-dive`
  Installing git-dive v0.1.6 (https://github.com/gitext-rs/git-dive#f7cd4237)
...

❯ git-dive src/generate_pipeline.py HEAD
revspec 'src/generate_pipeline.py' not found; class=Reference (4); code=NotFound (-3)

❯ git-dive src/generate_pipeline.py 29b94bae
revspec 'src/generate_pipeline.py' not found; class=Reference (4); code=NotFound (-3)

[epage]

The REV must be before FILE

Arguments:
  [REV]   [default: HEAD]
  <FILE>

Our usage is not correct

Usage: git-dive [OPTIONS] <FILE|--dump-config <PATH>|--list-languages|--list-themes|--acknowledgements|--diagnostic> [REV]

This is due to clap-rs/clap#5625.