add ipython to pyproject.toml

[minhsueh]

Issue:

Traceback (most recent call last):
  File "/Users/minhsuehchiu/Downloads/test/test.py", line 1, in <module>
    import crystal_toolkit
  File "/Users/minhsuehchiu/Downloads/test/.venv/lib/python3.11/site-packages/crystal_toolkit/__init__.py", line 9, in <module>
    from crystal_toolkit.core.jupyter import patch_msonable
  File "/Users/minhsuehchiu/Downloads/test/.venv/lib/python3.11/site-packages/crystal_toolkit/core/jupyter.py", line 10, in <module>
    from IPython.display import JSON, publish_display_data
ModuleNotFoundError: No module named 'IPython'

Fix:
Add ipython to pyproject.toml dependencies