Allow "schema.json" to be passed as an input in the CLI

[cblanquera]

Describe the feature you'd like to request

Instead of an idea file, it should be possible to pass a json file when generating code.

Describe the solution you'd like

When I do $ npm run idea -i schema.json, I want it to run through the same code generators as an idea file.

Describe alternatives you've considered

There isn't an alternative solution for this.

[cblanquera]

This issue is stale because it has been open for 30 days with no activity.

[cblanquera]

This issue was closed because it has been inactive for 14 days since being marked as stale.