Query parameters are being treated as prompts

[kyleect]

The query param ?path is being treated as a prompt reference even without the double bracket delimiters.

Get text content of a reqfile.

```%config
[[prompts]]
name = "file"
```


```%request
GET {{@clientUrl}}/api/files/file?path={{?file}} HTTP/1.1
```

Error

[
  [
    {
      "ParseError": {
        "UndefinedReferenceError": {
          "Prompt": "path"
        }
      }
    },
    {
      "start": 87,
      "end": 144
    }
  ]
]