ElemeFE/element ? reverse-engineered prompt

Build me a polished Vue 2 UI component library like Element UI, with a clean design system and a full set of reusable controls for building admin dashboards and web apps.

I want common things like buttons, inputs, selects, tables, forms, dialogs, alerts, tabs, pagination, date pickers, tooltips, menus, and layout helpers, plus a nice theme that looks consistent across everything. Please also include a simple docs and examples site so I can see how each component works and copy the usage easily.

Make it easy to install and use in a Vue 2 app, and support importing the whole library or just individual components. If you need to check current best practices or docs online while building it, go ahead. Keep the code organized, make the components feel professional, and add basic tests where it makes sense.