feat: Tutorial Module 2: Data Loading

[atambay37]

(e.g., GitHub repositories, research manuscripts, software documentation, etc.), Chunking, and Embedding

[vanitech]

Missing github, everything else is available at https://uw-ssec-tutorials.readthedocs.io/en/latest/SciPy2024/appendix/langchain-document-loaders.html

[anantmittal]

We didn't use LangChain's GitHub loaders for Astropy documentation.

The qdrant notebook in the Appendix has the code that we used.