Expand List types

[authentified-dave]

Summary

Currently the type property of the List component only supports bullet or number, this is somewhat limiting for content display.

Rationale

Trying to display terms and conditions / legal content inside a Shopify app is quite difficult without using the following list style types:

• lower-alpha
• upper-alpha
• lower-roman
• upper-roman

Not to mention all of the language-specific markers that are being ignored by the component.