add: stat difficulty and type.

feat: add ETH Zurich Cryptographic Protocols dataset (14 topics, 37 questions)

update: READE.md

fix: drop 8 unsolved questions and update README

fix: set dataset split to test (eval benchmark)

add: push_to_hub.py

add: bibtex.

update: README documentation and LFS pointers across all institutions

docs: add README and update LFS pointers for caltech, epfl, mit datasets

add: mit/basic batch

fix: topic

add: caltech hw quantum cryptography batch

add: epfl batch

initial commit