initial: mirror of @fn_library from fn_registry

75 components + DESIGN_SYSTEM.md + sync script.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

components/multi_select.tsx

@@ -0,0 +1,10 @@
+import { MultiSelect as MantineMultiSelect, type MultiSelectProps as MantineMultiSelectProps } from '@mantine/core'
+
+interface MultiSelectProps extends MantineMultiSelectProps {}
+
+function MultiSelect(props: MultiSelectProps) {
+  return <MantineMultiSelect {...props} />
+}
+
+export { MultiSelect }
+export type { MultiSelectProps }