[Bug]: Check Ruby support before creating theme app extension

[byrichardpowell]

Please confirm that you have:

• Searched existing issues to see if your issue is a duplicate. (If you’ve found a duplicate issue, feel free to add additional information in a comment on it.)
• Reproduced the issue in the latest CLI version.

In which of these areas are you experiencing a problem?

Extension

Expected behavior

When creating a theme extension the version of Ruby should be checked. If the correct version is not present, the theme extension should not be created.

Actual behavior

Creating a theme extension with an incompatible version of Ruby will succeed.

Note: The ruby version is only checked when running shopify app dev. It should be checked earlier so we don't generate files which won't be supported.

Verbose output

NA

Reproduction steps

1. Setup your system with a version of Ruby that is not supported by theme extensions
2. shopify app generate extension
3. Select a theme extension
4. The command will succeed. It should fail.

Operating System

Mac OS

Shopify CLI version (check your project's package.json if you're not sure)

Any

Shell

No response

Node version (run node -v if you're not sure)

No response

What language and version are you using in your application?

No response

[amcaplan]

@byrichardpowell does this issue make sense if we've just removed Ruby from the CLI (to be applied in 3.70)?

[jamesmengo]

👋🏻 Checking in from themes

@byrichardpowell could you let me know if this is still happening on the latest version?

This should not be happening on the latest release, but as Ariel mentioned, with the complete removal of Ruby in 3.70 I'd expect this to be resolved moving forward