chat-EOS fix: eos_token -> <turn|> (clean stop in generic apps)

chat-EOS fix: eos_token -> <turn|> (clean stop in generic apps)

Gemma 4 12B: drop simple-kernel gemma4_12b_qat_decode_int8lin_msdpa (superseded by _g8)

Gemma 4 12B: gemma4_12b_qat_decode_int4linsym_msdpa_g8 (higher-occupancy decode bundle)

Gemma 4 12B: gemma4_12b_qat_decode_int8lin_msdpa_g8 (higher-occupancy decode bundle)

Gemma 4 12B: card -> higher-occupancy (_g8) kernel as the ship

Gemma 4 12B: gemma4_12b_qat_decode_int8lin_msdpa (metal-sdpa decode bundle)

Gemma 4 12B: Gemma Terms of Use

Gemma 4 12B: model card

initial commit