Add section on AnimateLCM to docs

[DN6]

What does this PR do?

Add examples showing how to use AnimateLCM and AnimateLCM with Motion LoRAs to the AnimateDiff docs page.

Fixes # (issue)

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[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[sayakpaul]

Suggested change

	[AnimateLCM](https://animatelcm.github.io/) is a Motion Module checkpoint and an LCM LoRA created using a consistency learning strategy that decouples the distillation of the image generation priors and the motion generation priors.
	[AnimateLCM](https://animatelcm.github.io/) is a motion module checkpoint and an LCM LoRA created using a consistency learning strategy that decouples the distillation of the image generation priors and the motion generation priors.

Let's hyper-link LCM LoRA (https://huggingface.co/docs/diffusers/using-diffusers/inference_with_lcm_lora).

[sayakpaul]

Sweet!