Fix XML parsing and ONIX import workflow

[devBitt]

• Updated xmltramp to be compatible with Python 3.
• Rewrote onix-import.py to correctly read and parse ONIX XML files.
• Added sample.xml for testing XML parsing.
• Fixed import and module path issues for local development.
• Verified successful parsing of ONIX XML files.

[devBitt]

@cclauss
can anyone help me with the ruff (legacy alias)

• hook id: ruff
• exit code: 1

[cclauss]

The ruff legacy alias warning can be fixed by changing this line.

openlibrary-bots/.pre-commit-config.yaml

Line 34 in fdfb3b3

- id: ruff # See pyproject.toml for args

-      - id: ruff  # See pyproject.toml for args
+      - id: ruff-check  # See pyproject.toml for args

I would strongly recommend proposing changes to .pre-commit-config.yaml in a separate pull request from the changes for Fix XML parsing and ONIX import workflow.