Adding scopes "File", "Function", and "Class" for Python

[maldil]

The purpose of this PR is to add changes to support the File, Function, and Class scopes.

Summary of changes:

1. src/cleanup_rules/python/scope_config.toml - Added a new file that defines scopes for Python.
2. src/models/language.rs Updated to include the path for the scope file.
3. test-resources/python/find_import_extend_method_chain - Created a new folder to hold resources for testing scope functionality.
4. tests/tests.py - Modified to add new test cases and updated the paths to use absolute paths.

[CLAassistant]

All committers have signed the CLA.

[ketkarameya]

LGTM.
@dvmarcilio can we land this?