feat: add rufo support

README.md

@@ -221,6 +221,7 @@ You can view this list in vim with `:help conform-formatters`
 - [prettier](https://github.com/prettier/prettier) - Prettier is an opinionated code formatter. It enforces a consistent style by parsing your code and re-printing it with its own rules that take the maximum line length into account, wrapping code when necessary.
 - [prettierd](https://github.com/fsouza/prettierd) - prettier, as a daemon, for ludicrous formatting speed.
 - [rubocop](https://github.com/rubocop/rubocop) - Ruby static code analyzer and formatter, based on the community Ruby style guide.
+- [rufo](https://github.com/ruby-formatter/rufo) - Rufo is as an opinionated ruby formatter.
 - [ruff_fix](https://beta.ruff.rs/docs/) - An extremely fast Python linter, written in Rust. Fix lint errors.
 - [ruff_format](https://beta.ruff.rs/docs/) - An extremely fast Python linter, written in Rust. Formatter subcommand.
 - [rustfmt](https://github.com/rust-lang/rustfmt) - A tool for formatting rust code according to style guidelines.

doc/conform.txt

@@ -235,6 +235,7 @@ FORMATTERS                                                    *conform-formatter
 `prettierd` - prettier, as a daemon, for ludicrous formatting speed.
 `rubocop` - Ruby static code analyzer and formatter, based on the community Ruby
           style guide.
+`rufo` - Rufo is as an opinionated ruby formatter.
 `ruff_fix` - An extremely fast Python linter, written in Rust. Fix lint errors.
 `ruff_format` - An extremely fast Python linter, written in Rust. Formatter
               subcommand.

lua/conform/formatters/rufo.lua

@@ -0,0 +1,8 @@
+return {
+  meta = {
+    url = "https://github.com/ruby-formatter/rufo",
+    description = "Rufo is as an opinionated ruby formatter.",
+  },
+  command = "rufo",
+  exit_codes = { 0, 3 },
+}