[docs] Organize toctree by modality (#12514)

* reorganize

* fix

---------
Co-authored-by: Álvaro Somoza <asomoza@users.noreply.github.com>

docs/source/en/_toctree.yml

@@ -450,36 +450,28 @@
     sections:
     - local: api/pipelines/overview
       title: Overview
-    - local: api/pipelines/allegro
-      title: Allegro
+    - local: api/pipelines/auto_pipeline
+      title: AutoPipeline
+    - title: Image
+      sections:
       - local: api/pipelines/amused
         title: aMUSEd
       - local: api/pipelines/animatediff
         title: AnimateDiff
       - local: api/pipelines/attend_and_excite
         title: Attend-and-Excite
-    - local: api/pipelines/audioldm
-      title: AudioLDM
-    - local: api/pipelines/audioldm2
-      title: AudioLDM 2
       - local: api/pipelines/aura_flow
         title: AuraFlow
-    - local: api/pipelines/auto_pipeline
-      title: AutoPipeline
       - local: api/pipelines/blip_diffusion
         title: BLIP-Diffusion
       - local: api/pipelines/bria_3_2
         title: Bria 3.2
       - local: api/pipelines/chroma
         title: Chroma
-    - local: api/pipelines/cogvideox
-      title: CogVideoX
       - local: api/pipelines/cogview3
         title: CogView3
       - local: api/pipelines/cogview4
         title: CogView4
-    - local: api/pipelines/consisid
-      title: ConsisID
       - local: api/pipelines/consistency_models
         title: Consistency Models
       - local: api/pipelines/controlnet
@@ -502,8 +494,6 @@
         title: ControlNetUnion
       - local: api/pipelines/cosmos
         title: Cosmos
-    - local: api/pipelines/dance_diffusion
-      title: Dance Diffusion
       - local: api/pipelines/ddim
         title: DDIM
       - local: api/pipelines/ddpm
@@ -520,16 +510,10 @@
         title: Flux
       - local: api/pipelines/control_flux_inpaint
         title: FluxControlInpaint
-    - local: api/pipelines/framepack
-      title: Framepack
       - local: api/pipelines/hidream
         title: HiDream-I1
       - local: api/pipelines/hunyuandit
         title: Hunyuan-DiT
-    - local: api/pipelines/hunyuan_video
-      title: HunyuanVideo
-    - local: api/pipelines/i2vgenxl
-      title: I2VGen-XL
       - local: api/pipelines/pix2pix
         title: InstructPix2Pix
       - local: api/pipelines/kandinsky
@@ -544,32 +528,22 @@
         title: Latent Consistency Models
       - local: api/pipelines/latent_diffusion
         title: Latent Diffusion
-    - local: api/pipelines/latte
-      title: Latte
       - local: api/pipelines/ledits_pp
         title: LEDITS++
-    - local: api/pipelines/ltx_video
-      title: LTXVideo
       - local: api/pipelines/lumina2
         title: Lumina 2.0
       - local: api/pipelines/lumina
         title: Lumina-T2X
       - local: api/pipelines/marigold
         title: Marigold
-    - local: api/pipelines/mochi
-      title: Mochi
       - local: api/pipelines/panorama
         title: MultiDiffusion
-    - local: api/pipelines/musicldm
-      title: MusicLDM
       - local: api/pipelines/omnigen
         title: OmniGen
       - local: api/pipelines/pag
         title: PAG
       - local: api/pipelines/paint_by_example
         title: Paint by Example
-    - local: api/pipelines/pia
-      title: Personalized Image Animator (PIA)
       - local: api/pipelines/pixart
         title: PixArt-α
       - local: api/pipelines/pixart_sigma
@@ -586,10 +560,6 @@
         title: Semantic Guidance
       - local: api/pipelines/shap_e
         title: Shap-E
-    - local: api/pipelines/skyreels_v2
-      title: SkyReels-V2
-    - local: api/pipelines/stable_audio
-      title: Stable Audio
       - local: api/pipelines/stable_cascade
         title: Stable Cascade
       - title: Stable Diffusion
@@ -604,8 +574,6 @@
           title: Image variation
         - local: api/pipelines/stable_diffusion/img2img
           title: Image-to-image
-      - local: api/pipelines/stable_diffusion/svd
-        title: Image-to-video
         - local: api/pipelines/stable_diffusion/inpaint
           title: Inpainting
         - local: api/pipelines/stable_diffusion/k_diffusion
@@ -632,10 +600,6 @@
           title: Text-to-image
       - local: api/pipelines/stable_unclip
         title: Stable unCLIP
-    - local: api/pipelines/text_to_video
-      title: Text-to-video
-    - local: api/pipelines/text_to_video_zero
-      title: Text2Video-Zero
       - local: api/pipelines/unclip
         title: unCLIP
       - local: api/pipelines/unidiffuser
@@ -644,10 +608,52 @@
         title: Value-guided sampling
       - local: api/pipelines/visualcloze
         title: VisualCloze
-    - local: api/pipelines/wan
-      title: Wan
       - local: api/pipelines/wuerstchen
         title: Wuerstchen
+    - title: Video
+      sections:
+      - local: api/pipelines/allegro
+        title: Allegro
+      - local: api/pipelines/cogvideox
+        title: CogVideoX
+      - local: api/pipelines/consisid
+        title: ConsisID
+      - local: api/pipelines/framepack
+        title: Framepack
+      - local: api/pipelines/hunyuan_video
+        title: HunyuanVideo
+      - local: api/pipelines/i2vgenxl
+        title: I2VGen-XL
+      - local: api/pipelines/latte
+        title: Latte
+      - local: api/pipelines/ltx_video
+        title: LTXVideo
+      - local: api/pipelines/mochi
+        title: Mochi
+      - local: api/pipelines/pia
+        title: Personalized Image Animator (PIA)
+      - local: api/pipelines/skyreels_v2
+        title: SkyReels-V2
+      - local: api/pipelines/stable_diffusion/svd
+        title: Stable Video Diffusion
+      - local: api/pipelines/text_to_video
+        title: Text-to-video
+      - local: api/pipelines/text_to_video_zero
+        title: Text2Video-Zero
+      - local: api/pipelines/wan
+        title: Wan
+    - title: Audio
+      sections:
+      - local: api/pipelines/audioldm
+        title: AudioLDM
+      - local: api/pipelines/audioldm2
+        title: AudioLDM 2
+      - local: api/pipelines/dance_diffusion
+        title: Dance Diffusion
+      - local: api/pipelines/musicldm
+        title: MusicLDM
+      - local: api/pipelines/stable_audio
+        title: Stable Audio
   - title: Schedulers
     sections:
     - local: api/schedulers/overview