feat(gallery): add flint and bump llama.cpp to a37cc461 (#12854)

* chore(llama-cpp): bump to a37cc461 and drop the TTS patch

Move the llama.cpp pin to a37cc461, the merge of the Flint
architecture (ggml-org/llama.cpp#30928).

The TTS task patch is gone: upstream now carries
SERVER_TASK_TYPE_TTS, server_task::tts_inp, server_task_result_tts,
server_context_meta::has_cap_tts and the mtmd gen-audio helpers. The
patch is detected as already applied on the new pin. The gRPC server
uses the same symbols. The bonsai and turboquant forks still lack
them and keep using disable-tts-task.sh, so they are unchanged.

The score task patch is still needed: upstream has no
SERVER_TASK_TYPE_SCORE. It is regenerated against the new pin and
applies with no offset or fuzz. Upstream added
SERVER_TASK_TYPE_TRANSCRIBE_RT to server_task::need_logits(), which
broke one hunk, so SCORE is added next to it by hand.

The C++ backend was not built for this change.

Assisted-by: Claude:claude-sonnet-5-5

* feat(gallery): add flint

Add Recursive Flint, a 39.8B mixture-of-experts coding model with
about 2.5B active parameters, from the Unsloth GGUF repository. It
runs on llama.cpp with the Flint architecture support added upstream
in ggml-org/llama.cpp#30928.

Three quantizations are listed, with the default declaring the others
as variants: UD-Q4_K_XL (25 GB), UD-Q2_K_XL (13.6 GB) for small hosts
and UD-Q6_K_XL (36 GB) for larger ones. Sampling defaults follow the
model card (temperature 1, top_p 0.95, top_k 20). The library file
gallery/models/index.yaml is edited and gallery/index.yaml is
regenerated from it.

Assisted-by: Claude:claude-sonnet-5-5

---------

Co-authored-by: Ettore Di Giacinto <mudler@localai.io>

backend/cpp/llama-cpp/Makefile

@@ -1,5 +1,5 @@
 
-LLAMA_VERSION?=c0fd78626405c6d9b934efef0ec7291fcc20e3d6
+LLAMA_VERSION?=a37cc46104eb50900d5ab4a9ba02a0abdac039db
 LLAMA_REPO?=https://github.com/ggerganov/llama.cpp
 
 CMAKE_ARGS?=