Rename Tana.Q4_K_M.gguf to Tana_Q4_K_M.gguf

Rename unsloth.Q4_K_M.gguf to Tana.Q4_K_M.gguf

(Trained with Unsloth)

Rename unsloth.Q8_0.gguf to Tana8b.Q8_0.gguf

(Trained with Unsloth)

initial commit