[FGA-198] Update raw FGA schema convert output so that it includes version

[atainter]

Fixes issue where raw resource types output of workos fga schema convert could not be converted back to a schema.

Before

➜ workos fga schema convert schema.txt --output raw
[
        {
            "type": "user",
            "relations": {}
        }
    ]

After

➜ workos fga schema convert schema.txt --output raw
{
    "version": "0.2",
    "resource_types": [
        {
            "type": "user",
            "relations": {}
        }
    ]
}

[linear]

FGA-198 Bug: Update FGA Schema Convert CLI to include version in resource type response