Add support for project-local `ansible-lint` (via `uv`, `poetry`, and `pipenv`)
when using the system-wide installed one is not possible or not desirable.
1. Add ale.setup and ale.setup.buffer for pure Lua configuration.
2. Update many global settings to use Booleans instead of numbers to
make types easiert to work with in Lua.
3. Radically reformat documentation and fix errors to make
documentation more usable for Neovim users.
