GPT-2 124M Core AI conversion for Aether Kit

Upstream checkpoint: openai-community/gpt2
Revision: 607a30d783dfa663caf39e06633721c8d4cfcd7e
Original model/software: Copyright (c) 2019 OpenAI; Modified MIT License (LICENSE).

Conversion tooling: Aether Kit, Apache-2.0
https://github.com/bubstackdev/aether-kit
Source commit: 20bbc96
Architecture reference: Hugging Face Transformers 4.57.3 GPT-2 implementation, Apache-2.0.
No instruction tuning or further model training was performed for this conversion.