Handle remote JSON without an extension.

I was curious to see what would happen if I called a JSON file and was pleasantly surprised that It was also nicely formatted.

For this to work a JSON extension is required.

✅ `glow https://raw.githubusercontent.com/laravel/framework/refs/heads/13.x/composer.json`
✅ `glow local.json`
⛔️ `glow https://api.domain.com/endpoint`

I know it's not "Render markdown on the CLI, with pizzazz! 💅🏻" but it would be really nice if JSON also had some style 😁

Start by tracing how Glow handles remote URLs and decides whether content is JSON or Markdown; the issue provides the commands `glow https://api.domain.com/endpoint` and `glow https://raw.githubusercontent.com/laravel/framework/refs/heads/13.x/composer.json` as examples. Done means extensionless remote JSON is formatted while local JSON and existing Markdown rendering continue to work.

Written by the indexing model from the issue text.