add shadcn-penpot v1 file

[FatumaA]

This is v1, lots of components to go.

A claude write up below:

shadcn/ui Design System for Penpot

A Penpot-native implementation of the shadcn/ui component library,
built with design tokens, auto-layout, and Penpot's components/v2 system.
Includes the Lucide icon set as a shared library.

What's included

• 23 components across 5 phases (see STATUS page in file)
• Full design token set — color, spacing, radius, typography, shadow
• Tokens follow shadcn's CSS variable naming convention
• Lucide icon set

Known gaps

• Variants: Components were started before Penpot supported variants.
  All states exist as sibling components using the ComponentName/StateName
  convention (e.g. Button/Destructive). Retrofitting to proper variants
  is planned.
• In progress: Pagination, Breadcrumb, Popover, Tooltip, Dropdown Menu,
  Drawer, Sheet, Table, Sonner/Toast, Typography, Select
• Planned: Select variants, Button variants, and retrofitting all existing
  components with proper Penpot variants once MCP support is available (or by hand)