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/footer-columns.md

@@ -0,0 +1,20 @@
+# FooterColumns
+
+A list of links as columns to display in your Footer.
+
+## Key Props
+
+- `columns`: as an array of objects with the following properties:
+
+- `label: string`{lang="ts-type"}
+- `children?: FooterColumnLink[]`{lang="ts-type"}
+
+Each column contains a `children` array of objects that define the links.
+
+## Usage
+
+```vue
+<UFooterColumns
+  <!-- props here -->
+/>
+```