formatter: Remove CST and old formatting (#4730)

crates/ruff_python_formatter/src/module/mod.rs

@@ -0,0 +1,33 @@
+use crate::context::ASTFormatContext;
+use ruff_formatter::format_element::tag::VerbatimKind;
+use ruff_formatter::prelude::*;
+use ruff_formatter::write;
+use rustpython_parser::ast::{Mod, Ranged};
+
+pub(crate) struct FormatModule<'a> {
+    module: &'a Mod,
+}
+
+impl<'a> FormatModule<'a> {
+    pub(crate) fn new(module: &'a Mod) -> Self {
+        Self { module }
+    }
+}
+
+impl Format<ASTFormatContext<'_>> for FormatModule<'_> {
+    fn fmt(&self, f: &mut Formatter<ASTFormatContext<'_>>) -> FormatResult<()> {
+        let range = self.module.range();
+
+        write!(f, [source_position(range.start())])?;
+
+        f.write_element(FormatElement::Tag(Tag::StartVerbatim(
+            VerbatimKind::Verbatim {
+                length: range.len(),
+            },
+        )))?;
+        write!(f, [source_text_slice(range, ContainsNewlines::Detect)])?;
+        f.write_element(FormatElement::Tag(Tag::EndVerbatim))?;
+
+        write!(f, [source_position(range.end())])
+    }
+}