qwen docs + new config (#3499) [skip ci]

* qwen docs + new config

* docss lint

* simplify comments

* read me

* lint comments

* Update docs/multimodal.qmd

* Update docs/multimodal.qmd

* Update examples/qwen3.5/9b-fft-vision.yaml

* chore: fix link and incorrect points

---------

Co-authored-by: NanoCode012 <kevinvong@rocketmail.com>
Co-authored-by: NanoCode012 <nano@axolotl.ai>

docs/multimodal.qmd

@@ -20,6 +20,7 @@ format:
 - [Gemma-3n](#sec-gemma-3n)
 - [Qwen2-VL](#sec-qwen2-vl)
 - [Qwen2.5-VL](#sec-qwen25-vl)
+- [Qwen3.5](#sec-qwen3-5)
 - [GLM-4.6V](#sec-glm-4-6v)
 - [SmolVLM2](#sec-smolvlm2)
 - [LFM2-VL](#sec-lfm2-vl)
@@ -191,6 +192,14 @@ base_model: Qwen/Qwen3-VL-4B-Instruct
 chat_template: qwen2_vl  # same as qwen2-vl
 ```
 
+### Qwen3.5 {#sec-qwen3-5}
+
+```yaml
+base_model: Qwen/Qwen3.5-9B
+
+chat_template: qwen3_5
+```
+
 ### GLM-4.6V {#sec-glm-4-6v}
 
 Both GLM-4.6V (106B MoE) and GLM-4.6V-Flash (9B) are supported.