Add mokzu provider

[mokzuapp]

Add Mokzu Provider for Image-to-Video Inference

Adds Mokzu as an inference provider for the image-to-video task.

Provider Info

• Org: mokzu (Team plan)
• Base URL: https://api.mokzu.com
• Task: image-to-video
• Model: Wan-AI/Wan2.2-I2V-A14B

Implementation

• Created MokzuImageToVideoTask provider helper
• Registered in types and provider list
• Handles base64 image input
• Returns video URL

Live Endpoints

# Check models/pricing
curl https://api.mokzu.com/v1/models

# Inference endpoint
POST https://api.mokzu.com/v1/image-to-video

# Billing endpoint  
POST https://api.mokzu.com/billing

[mokzuapp]

@Wauplin Hi! This PR has been open for over a month. We've completed all requirements but are blocked on server-side provider enablement. Posted in the provider discussion 28 days ago with no response. Can you help expedite this or point us to the right contact? Our API is live at https://api.mokzu.com and ready for validation.

[mokzuapp]

@Wauplin @hanouticelina @julien-c - Could you please review this PR? We've completed all requirements and our API is live at https://api.mokzu.com. Waiting for server-side provider enablement to complete model mapping registration.

Companion PR: huggingface/huggingface.js#1920

Thank you!