Add initial Python SDK support

[2005-ab]

Summary

This PR introduces an initial Python SDK for MuAPI, providing a programmatic interface on top of the existing client implementation.

Features Added

Images

• client.images.generate()
• client.images.edit()

Videos

• client.videos.generate()
• client.videos.from_image()

Uploads

• client.uploads.upload()

Predictions

• client.predictions.get()
• client.predictions.wait()

Example Usage

from muapi import MuAPI

client = MuAPI()

result = client.images.generate(
    prompt="A futuristic city at sunset"
)

print(result)

Additional Changes

• Added SDK entry point via MuAPI
• Added usage examples under the examples/ directory
• Updated README with Python SDK documentation
• Reused existing client.py request and polling logic to avoid code duplication

Notes

This is an initial SDK implementation focused on providing a clean Python interface while maintaining compatibility with the existing CLI architecture.