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/banner.md

@@ -0,0 +1,19 @@
+# Banner
+
+Display a banner at the top of your website to inform users about important information.
+
+## Key Props
+
+- `title`: to display a title on the Banner.
+- `icon`: to display an icon on the Banner.
+- `color`: to change the color of the Banner.
+- `close`: to display a [Button](/docs/components/button) to dismiss the Banner.
+- `actions`: to add some [Button](/docs/components/button) actions to the Banner.
+
+## Usage
+
+```vue
+<UBanner
+  <!-- props here -->
+/>
+```