chore(gallery): add FrogNano Q5 and Q6 variants

Fill the quantization gap between the existing Q4 and Q8 builds. Pin both downloads to the same publisher revision and verify SHA256 values against LFS metadata and x-linked-etag headers.

Assisted-by: Codex:gpt-6

(cherry picked from commit 1c17d6fe9d, mudler/LocalAI#12543)
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

gallery/index.yaml

@@ -70438,6 +70438,8 @@
 - name: frognano-4b-2609
   url: github:mudler/LocalAI/gallery/virtual.yaml@master
   variants:
+    - model: frognano-4b-2609-q5
+    - model: frognano-4b-2609-q6
     - model: frognano-4b-2609-q8
   urls:
     - https://huggingface.co/microsoft/FrogNano-4B-2609
@@ -70476,6 +70478,84 @@
     - filename: FrogNano-4B-2609-Q4_K_M.gguf
       uri: https://huggingface.co/bartowski/FrogNano-4B-2609-GGUF/resolve/dfbb801e04ddf045ffd245b9f1a546ed0c7d960f/FrogNano-4B-2609-Q4_K_M.gguf
       sha256: 01fba00c57e2976399ae4947f0b4fdde4623d3e410a435bf2ae39ddf164e9b0a
+- name: frognano-4b-2609-q5
+  url: github:mudler/LocalAI/gallery/virtual.yaml@master
+  urls:
+    - https://huggingface.co/microsoft/FrogNano-4B-2609
+    - https://huggingface.co/bartowski/FrogNano-4B-2609-GGUF
+  description: |
+    FrogNano is Microsoft's Qwen3.5-4B derivative for repository-level coding
+    and tool use. This Q5_K_M GGUF build uses the embedded chat template
+    with a 32K-token default context. Configured for text input; upstream
+    does not evaluate or support its inherited image and video components.
+  license: mit
+  tags:
+    - llm
+    - gguf
+    - cpu
+    - gpu
+    - coding
+    - reasoning
+  last_checked: "2026-10-07"
+  overrides:
+    backend: llama-cpp
+    context_size: 32768
+    function:
+      grammar:
+        disable: true
+    known_usecases:
+      - chat
+    options:
+      - use_jinja:true
+    parameters:
+      model: FrogNano-4B-2609-Q5_K_M.gguf
+      temperature: 0.6
+      repeat_penalty: 1.0
+    template:
+      use_tokenizer_template: true
+  files:
+    - filename: FrogNano-4B-2609-Q5_K_M.gguf
+      uri: https://huggingface.co/bartowski/FrogNano-4B-2609-GGUF/resolve/dfbb801e04ddf045ffd245b9f1a546ed0c7d960f/FrogNano-4B-2609-Q5_K_M.gguf
+      sha256: f37ff83a6229a127866c1deb414ae36f6c9c30e1b21d8e0bbe313f826cb23601
+- name: frognano-4b-2609-q6
+  url: github:mudler/LocalAI/gallery/virtual.yaml@master
+  urls:
+    - https://huggingface.co/microsoft/FrogNano-4B-2609
+    - https://huggingface.co/bartowski/FrogNano-4B-2609-GGUF
+  description: |
+    FrogNano is Microsoft's Qwen3.5-4B derivative for repository-level coding
+    and tool use. This Q6_K GGUF build uses the embedded chat template
+    with a 32K-token default context. Configured for text input; upstream
+    does not evaluate or support its inherited image and video components.
+  license: mit
+  tags:
+    - llm
+    - gguf
+    - cpu
+    - gpu
+    - coding
+    - reasoning
+  last_checked: "2026-10-07"
+  overrides:
+    backend: llama-cpp
+    context_size: 32768
+    function:
+      grammar:
+        disable: true
+    known_usecases:
+      - chat
+    options:
+      - use_jinja:true
+    parameters:
+      model: FrogNano-4B-2609-Q6_K.gguf
+      temperature: 0.6
+      repeat_penalty: 1.0
+    template:
+      use_tokenizer_template: true
+  files:
+    - filename: FrogNano-4B-2609-Q6_K.gguf
+      uri: https://huggingface.co/bartowski/FrogNano-4B-2609-GGUF/resolve/dfbb801e04ddf045ffd245b9f1a546ed0c7d960f/FrogNano-4B-2609-Q6_K.gguf
+      sha256: 855278f785dc23fc4c150bf74e20ca6ed53036c06fb04abfd0ddc60d02116b6a
 - name: frognano-4b-2609-q8
   url: github:mudler/LocalAI/gallery/virtual.yaml@master
   urls: