This commit refactors the core functionality of the "Save Image" node to
increase its robustness and ease future expansion. Internal methods that
were previously classmethods within the SaveImage class have been relocated
to a new `node_helpers.py` file, allowing for potential reuse across other
parts of the codebase and improving overall cleanliness.
Additionally, the refactor includes basic console logging to provide users
with simple feedback on the injection process's outcome, such as confirming
successful execution.
