Update lockfile (exa now requires Rust 1.45.2 or higher)
Co-authored-by: NMélanie Chauvel <perso@hack-libre.org>

* Add Alpine Linux into Installation in Readme
Co-authored-by: NMélanie Chauvel <perso@hack-libre.org>

• Mention using 'just --tasks'
• Mention using the '--release' flag
• Mention how to build and install the man pages

• Make the README look a bit nicer, with centered text and links and badges and stuff like that. Everyone knows that software is better if it has badges in its readme
• Fix bug where the options list was unnaturally spaced
• More OS installation commands
• A couple of rephrasings

- Update completions
  - fish		(-D)
  - zsh			(-D, --changed)
- Update man page	(--changed)
- Update README		(-F, --changed, --icons)
- Update help text	(--changed)

See #530

Co-Authored-By: Npconcepcion <pconcepcion@gmail.com>

After 1efb8a51 the binary can be installed without specifying the git repo.

!!

I changed my mind about which way round sorting by “newest” or by “oldest” should actually go. If you’re listing a large directory, you see the last lines of the output first, so these files should be the ones with the largest whatever the sort field is. It’s about sorting *last*, not sorting *first*. Sorting by size wouldn’t say “sorts smallest files first”, it would say “sorts largest files last”. Right?

Also, add a new suggestion that warns against “ls -lt”.

I don’t really see the modified date as the *modified* date, rather just the *date* field, because it’s the date field I refer to like 99.9% of the time. So now it has aliases to match.

Also are included are aliases for the reverse order, because I’d rather write “new” than “the reverse of old”.

This was touched on in #209 where I got the docs wrong compared to the actual implementation, but after thinking about it, I’d like to switch it round. (The --sort=Name and --sort=name difference has also been switched.) See the big ol’ comment for my reasons.

Because this changes core functionality, it broke many, many tests. You can see that this doesn’t change the -star- tests because the shell, rather than exa, orders the globbed files.

I kept on forgetting which way round Sensitive and Insensitive went, so I named them after the effect they have.

Now I just need to remember to update it. Was suggested in #197.

The old option descriptions were all written at different times, and needed some consistency. This makes everything consistent between the help text, README, man page, and shell completions, and fixes some mistakes made when writing them.

This also adds the missing options to the man page, fixing #175.