[pylint] add fix safety section (PLC0414) (astral-sh#17802)

This PR adds a fix safety section in comment for rule `PLC0414`.

parent: astral-sh#15584 
discussion: astral-sh#6294

Author: yunchipang

crates/ruff_linter/src/rules/pylint/rules/useless_import_alias.rs

@@ -12,6 +12,11 @@ use crate::checkers::ast::Checker;
 /// ## Why is this bad?
 /// The import alias is redundant and should be removed to avoid confusion.
 ///
+/// ## Fix safety
+/// This fix is marked as always unsafe because the user may be intentionally
+/// re-exporting the import. While statements like `import numpy as numpy`
+/// appear redundant, they can have semantic meaning in certain contexts.
+///
 /// ## Example
 /// ```python
 /// import numpy as numpy