refactor: Update to clap 4

[berombau]

Closes #578

• Followed the migration guide.
• Added features (help, usage, error-context) because of default-features = false.
• There could be some subtle breaking changes, but the existing tests were quite extensive.
• Removed max_term_width(90) in favor of wrap_help.
• The default new output of --help has some subtle changes, that all seem good, reducing the total output size from 161 lines to 133 lines (with equal width COLUMNS=90).
• The default template has changed things like color and capitalization. This is has been discussed before with bat.

TODO:

• There are some Builder patterns like usage strings e.g. arg! that could simplify things, but these are not used here.

clap v3 hyperfine --help

clap v4 cargo run -- hyperfine --help

[sharkdp]

Thank you very much for your contribution!

The "Min. supported rust version" check currently fails. We might need to bump the min. supported Rust version (in .github/workflows/CICD.yml and in the README).

There could be some subtle breaking changes, but the existing tests were quite extensive.

Well... hopefully not. Do you have any suspicions? Maybe parts of your changes where you're not 100% sure that the migration did the right thing? If so, we should at least check manually. Or add more integration tests, ideally.

There are some Builder patterns like usage strings e.g. arg! that could simplify things, but these are not used here.

Okay. I guess that could be done later?

[sharkdp]

Hm. Do we need both? Or could we use command_list above?

[berombau]

I removed the unneeded command_list variables

[berombau]

The MSRV of clap v4 is 1.60.0, so I bumped it to that version.
The subtle breaking changes are what the clap migration docs said, but haven't found any so far.

[sharkdp]

Thank you!