Add request example to readme

[etsien]

Hi! Thanks for putting this together, I was frustrated with trying to manually configure pytorch/CUDA for docling and found this. It's super helpful, but for newer users it would be helpful to structure the readme into a 1,2,3 step process on setup, and maybe include a section on how to actually send the request.

Something like an example of how to hit the endpoints you set up:

import requests
import json
import os

# API endpoint
url = "http://localhost:8080/parse/file"

# PDF file path
pdf_path = os.path.join("path", "to", "your", "file.pdf")

# Send request
response = requests.post(
    url,
    files={'file': open(pdf_path, 'rb')},
    data={'data': json.dumps({
        "include_json": False,
        "output_format": "markdown"
    })}
)

# ++ Code that handles the response, etc.