FEATURE REQUEST: add proxy option when generating client code

i d like to add a feature that when importing a curl request it recognizes proxy header in curl --socks5-hostname and generates client code with proxy in it.

example
input
```curl --socks5-hostname localhost:9050 https://example.com```

output
```
import requests

url = "https://example.com"
payload = ""
headers = {}
proxies = {
'http': 'socks5://localhost:9050',
'https': 'socks5://localhost:9050',
}

response = requests.request("GET", url, data=payload, headers=headers, proxies=proxies)
```

Start by tracing how curl imports are parsed and how the Python requests client output is generated. Reproduce the shown --socks5-hostname input, then verify that the generated requests code includes the proxy configuration while preserving the existing URL and request details. No file or test is named in the issue.

由索引模型根据 Issue 内容生成。