mtmd : add qwen2vl and qwen2.5vl (#13141)
* llava : add clip_n_output_tokens, deprecate clip_n_patches
* mtmd : add qwen2vl and qwen2.5vl
* decode_embd_batch::set_position_...
* working version
* deprecate llama-qwen2vl-cli
* correct order W, H of clip_embd_nbytes_by_img
* edit existing line in hot topics
