[QDP] Add NumPy dependency and Support NumPy 1D array input for single sample encoding

[rich7420]

Summary

This PR adds infrastructure and basic NumPy array input support for single sample encoding. It includes dependency setup, error types, and the core encode_numpy() method for 1D arrays.

• add dependency qdp-python/Cargo.toml
• add error type qdp-core/src/error.rs
• add encode_numpy() qdp-python/src/lib.rs
• add a helper methods in qdp-core/src/lib.rs for slice conversion
• add unit test qdp-python/tests/test_numpy_input.py