v0.0.1: first public release of α-PFN

Initial public release

• Available on PyPI: pip install "AlphaPFN"
• Quickstart notebook: examples/quickstart.ipynb
• Paper: https://openreview.net/forum?id=7Oonij8oLU

API surface:

• AlphaPFN.from_pretrained(acquisition=...) — EI, UCB, PES, MES, JES
• AlphaPFNPosteriorMean(pfn) — botorch-compatible posterior-mean acquisition