mtmd: add Gemma 4 audio conformer encoder support

<table> <tr><td> <a href="https://www.reddit.com/r/LocalLLaMA/comments/1sihnxk/mtmd_add_meralion2_multimodal_audio_support_by/"> <img alt="mtmd : add MERaLiON-2 multimodal audio

<table> <tr><td> <a href="https://www.reddit.com/r/LocalLLaMA/comments/1teryn8/llama_spec_mtp_support_by_am17an_pull_request/"> <img alt="llama + spec: MTP Support by am17an ·

<table> <tr><td> <a href="https://www.reddit.com/r/LocalLLaMA/comments/1sjhxrw/audio_processing_landed_in_llamaserver_with_gemma4/"> <img alt="Audio processing landed in

<table> <tr><td> <a href="https://www.reddit.com/r/LocalLLaMA/comments/1x6mlby/add_nemotron_super_35_vl_and_nemotron_bolt_74b/"> <img alt="Add Nemotron Super 3.5 VL and Nemotron

<table> <tr><td> <a href="https://www.reddit.com/r/LocalLLaMA/comments/1tijpwl/wip_gemma_4_mtp/"> <img alt="[WIP] Gemma 4 MTP"

<table> <tr><td> <a href="https://www.reddit.com/r/LocalLLaMA/comments/1syfenw/ggmlcuda_add_flashattn_support_for_dkq320dv256/"> <img alt="ggml-cuda: add flash-attn support for

<table> <tr><td> <a href="https://www.reddit.com/r/LocalLLaMA/comments/1t3guzw/llamacpp_mtp_support_now_in_beta/"> <img alt="Llama.cpp MTP support now in beta!"

<table> <tr><td> <a href="https://www.reddit.com/r/LocalLLaMA/comments/1sffz0e/gemmatunermultimodal_finetune_gemma_4_with_audio/"> <img alt="gemma-tuner-multimodal: Fine-tune