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/content-navigation.md

@@ -0,0 +1,18 @@
+# ContentNavigation
+
+An accordion-style navigation component for organizing page links.
+
+## Key Props
+
+- `navigation`: with the `navigation`{lang="ts-type"} value you get when fetching the navigation of your app.
+- `color`: to change the color of the navigation links.
+- `variant`: to change the variant of the navigation links.
+- `highlight`: to display a highlighted border for the active link.
+
+## Usage
+
+```vue
+<UContentNavigation
+  <!-- props here -->
+/>
+```