Support preferred locales for hardcoded language

[mathewjordan]

Description

Clover should support locales for hardcoded language strings in the User Interface.

Support should include:

• Any UI items (About, More Information, etc...)
• Alt, title, and aria attributes on UI elements (Icon titles for SVGs, arias for Item thumbnails)

Locales should be modeled in a way to be set from a high level property on the Clover component. Some default locales likely en or en-us would be used.

Done looks like

• [x] Clover is more mature, not an English-only application
• [ ] UI items and alt, title, and aria-* attributes are derived from locale set constants
• [ ] System created for setting preferred locales
• [ ] Docs demonstrate how contributors can submit new locales