Create a helper function for common Kontent.ai changes

[Simply007]

Expected result

Allow users to make more complicated operations by single and easy call i.e. add content type to allowed content type of another content type's element.

Additional context

• Decide whether these functions should be accessible only programmatically, or if it makes sense to provide them via the CLI as well.

Resources

Examples - will be @tommarhall

[IvanKiral]

waiting for examples, ping @tommarshall