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_ast/src/relocate.rs

@@ -200,5 +200,8 @@ pub fn relocate_expr(expr: &mut Expr, location: TextRange) {
                 relocate_expr(expr, location);
             }
         }
+        Expr::LineMagic(ast::ExprLineMagic { range, .. }) => {
+            *range = location;
+        }
     }
 }