Integrate the new Jupyter AST nodes in Ruff (#6086)

## Summary

This PR adds the implementation for the new Jupyter AST nodes i.e.,
`ExprLineMagic` and `StmtLineMagic`.

## Test Plan

Add test cases for `unparse` containing magic commands

resolves: #6087

crates/ruff_python_formatter/src/statement/mod.rs

@@ -66,6 +66,7 @@ impl FormatRule<Stmt, PyFormatContext<'_>> for FormatStmt {
             Stmt::Break(x) => x.format().fmt(f),
             Stmt::Continue(x) => x.format().fmt(f),
             Stmt::TypeAlias(x) => x.format().fmt(f),
+            Stmt::LineMagic(_) => todo!(),
         }
     }
 }