Does not properly parse URL to program files on WIndows as a URL

[sirredbeard]

gptscript does not properly parse URLs to program files. Attempts to open the URL as a file.

Steps to reproduce:

1. Install gptscript on Windows with winget install gptscript-ai.gptscript
2. Run gptscript https://get.gptscript.ai/echo.gpt --input 'Hello, World!'

Expected results:

OUTPUT:

Hello, World!

Actual results:

2024/02/21 15:34:01 open .\https:\get.gptscript.ai\echo.gpt: The filename, directory name, or volume label syntax is incorrect.

[ibuildthecloud]

:shakes fist at windows: