Add Intro page of TCD (#7259)

* add tcd intro

* resolve repos

* Apply suggestions from code review

Co-authored-by: Steven Liu <[email protected]>

* revise NFEs related

* change inpainting location

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Co-authored-by: Sayak Paul <[email protected]>
Co-authored-by: Steven Liu <[email protected]>

Author: 3 people

docs/source/en/_toctree.yml

@@ -104,6 +104,8 @@
       title: Latent Consistency Model-LoRA
     - local: using-diffusers/inference_with_lcm
       title: Latent Consistency Model
+    - local: using-diffusers/inference_with_tcd_lora
+      title: Trajectory Consistency Distillation-LoRA
     - local: using-diffusers/svd
       title: Stable Video Diffusion
     title: Specific pipeline examples