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.
* feat: Add Zig zlint linter and handler for ALE
* docs: Add zlint documentation to ALE Zig integration guide
* docs: Updating docs for zlint support
* tests: Adding tests for checking zlint executable and command
* refactor: Move zlint configuration test to separate test file
