Add Boomer FLA checkpoint (step 055000, ema weights, bf16)

Upload modeling_boomer_fla.py

Delete transformer/modeling_boomer_fla.py

Add Boomer FLA checkpoint (step 055000, ema weights, bf16)

Add Boomer FLA fine-tuned checkpoint (step 055000, ema weights)

Add Boomer FLA fine-tuned checkpoint (step 055000, ema weights)

Delete transformer

Add Boomer FLA fine-tuned checkpoint (step 055000, ema weights)