Stub for Apple Numbers reader/writer
- [x] Begins implementation of #55497 
- [x] Tests added and passed to (pandas/tests/io/test_apple_numbers.py)
- [x] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [x] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

Initial commit for starting a new reader and writer. Next step will be writing some tests.
Closing as per PR and issue comments