format StmtBreak (#5158)

## Summary

format `StmtBreak`

trying to learn how to help out with the formatter. starting simple

## Test Plan

new snapshot test

crates/ruff_python_formatter/resources/test/fixtures/ruff/statement/break.py

@@ -0,0 +1,5 @@
+# leading comment
+while True:  # block comment
+    # inside comment
+    break  # break comment
+    # post comment

crates/ruff_python_formatter/src/snapshots/ruff_python_formatter__tests__ruff_test__statement__break_py.snap

@@ -0,0 +1,25 @@
+---
+source: crates/ruff_python_formatter/src/lib.rs
+expression: snapshot
+---
+## Input
+```py
+# leading comment
+while True:  # block comment
+    # inside comment
+    break  # break comment
+    # post comment
+```
+
+
+
+## Output
+```py
+# leading comment
+while True:  # block comment
+    # inside comment
+    break  # break comment
+    # post comment
+```
+
+

crates/ruff_python_formatter/src/statement/stmt_break.rs

@@ -1,12 +1,13 @@
-use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
-use ruff_formatter::{write, Buffer, FormatResult};
+use crate::{FormatNodeRule, PyFormatter};
+use ruff_formatter::prelude::text;
+use ruff_formatter::{Format, FormatResult};
 use rustpython_parser::ast::StmtBreak;
 
 #[derive(Default)]
 pub struct FormatStmtBreak;
 
 impl FormatNodeRule<StmtBreak> for FormatStmtBreak {
-    fn fmt_fields(&self, item: &StmtBreak, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [not_yet_implemented(item)])
+    fn fmt_fields(&self, _item: &StmtBreak, f: &mut PyFormatter) -> FormatResult<()> {
+        text("break").fmt(f)
     }
 }