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/radio_group.md

@@ -0,0 +1,61 @@
+---
+name: radio_group
+kind: component
+lang: ts
+domain: ui
+version: "1.0.0"
+purity: impure
+signature: "RadioGroup(props: RadioGroupProps): JSX.Element"
+description: "Grupo de opciones exclusivas accesible. Mantine Radio.Group + Radio."
+tags: [radio, radio-group, component, ui, interactive, form, mantine]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: ""
+imports: ["@mantine/core"]
+output: "Componente RadioGroup que renderiza grupo de opciones exclusivas accesible"
+tested: false
+tests: []
+test_file_path: ""
+file_path: "frontend/functions/ui/radio_group.tsx"
+props:
+  - name: value
+    type: "string"
+    required: false
+    description: "Valor seleccionado (controlado)"
+  - name: defaultValue
+    type: "string"
+    required: false
+    description: "Valor inicial (no controlado)"
+  - name: onValueChange
+    type: "(value: string) => void"
+    required: false
+    description: "Callback al cambiar seleccion"
+  - name: disabled
+    type: "boolean"
+    required: false
+    description: "Deshabilita todo el grupo"
+  - name: orientation
+    type: "'horizontal' | 'vertical'"
+    required: false
+    description: "Orientacion del grupo"
+emits: [onValueChange]
+has_state: false
+framework: react
+variant: []
+---
+
+## Ejemplo
+
+```tsx
+<RadioGroup defaultValue="option-a">
+  <RadioGroupItem value="option-a" label="Opcion A" />
+  <RadioGroupItem value="option-b" label="Opcion B" />
+  <RadioGroupItem value="option-c" label="Opcion C" disabled />
+</RadioGroup>
+```
+
+## Notas
+
+RadioGroup es el contenedor (Mantine Radio.Group). RadioGroupItem es cada opcion individual (Mantine Radio). Soporta orientacion horizontal y vertical.