Merge branch 'main' into tome

Author: sayakpaul

docs/source/en/_toctree.yml

@@ -154,6 +154,8 @@
       title: DDPM
     - local: api/pipelines/dit
       title: DiT
+    - local: api/pipelines/if
+      title: IF
     - local: api/pipelines/latent_diffusion
       title: Latent Diffusion
     - local: api/pipelines/paint_by_example