Add NagiV2-L weights, Core ML exports and model card (nagi_v2_l_ft2_t768_fp32.mlpackage)

Add NagiV2-L weights, Core ML exports and model card (nagi_v2_l_ft2_t768_fp16.mlpackage)

Add NagiV2-L weights, Core ML exports and model card (nagi_v2_l_ft2_final.pt)

Add NagiV2-L weights, Core ML exports and model card (README.md)

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