Add nuxt-skills and update auto quotes to use new policy API structure

- Add nuxt-skills (vue, nuxt, nuxt-ui) to .claude/skills/
- Create useCustomerSelection() composable for managing insured/buyer selection
- Create usePolicyApi() composable for policy API operations
- Update auto quote components to use insured/buyer instead of client
- Update vehicle fields: remove valorVehiculo, add market_value, requested_value, rc_limits
- Make chassis_number and engine_number optional
- Update auto quote types and composables to match new API structure
- Update auto quote page to submit to policy API with new structure

.claude/skills/nuxt-ui/components/empty.md

@@ -0,0 +1,21 @@
+# Empty
+
+A component to display an empty state.
+
+## Key Props
+
+- `title`: to set the title of the empty state.
+- `description`: to set the description of the empty state.
+- `icon`: to set the icon of the empty state.
+- `avatar`: to set the avatar of the empty state.
+- `actions`: to add some [Button](/docs/components/button) actions to the empty state.
+- `variant`: to change the variant of the empty state.
+- `size`: to change the size of the empty state.
+
+## Usage
+
+```vue
+<UEmpty
+  <!-- props here -->
+/>
+```