[Feature] One-line binary install improvement

- [ x] I have read through the manual page (`man fzf`)
- [ x] I have the latest version of fzf
- [ x] I have searched through the existing issues

## Info

- OS
- [x] Linux
- [ ] Mac OS X
- [ ] Windows
- [ ] Etc.
- Shell
- [ ] bash
- [ ] zsh
- [x] fish

## Feature
I have a plethora of great statically linked binary installs in Linux (Ubuntu). These include `ripgrep`, `exa`, `bat`, `fd` etc. None shines as well as `chezmoi` when it comes to the one-line installer.

I recommend to re-implement the one-line binary installer to follow that of `chezmoi`. See this documentation: https://github.com/twpayne/chezmoi/blob/master/docs/INSTALL.md#one-line-binary-install

In effect, what it does, is to download the latest statically linked binary for your operating system and architecture into `./bin`
This means I can put myself in whatever dir I want and just call the installer and it will be installed into the bin path of my choosing. Be that `~/bin` or `.local/bin` or whatever I prefer.