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/form-field.md

@@ -0,0 +1,20 @@
+# FormField
+
+A wrapper for form elements that provides validation and error handling.
+
+## Key Props
+
+- `label`: to set the label for the form control.
+- `description`: to provide additional information below the label.
+- `hint`: to display a hint message next to the label.
+- `help`: to display a help message below the form control.
+- `error`: to display an error message below the form control.
+- `size`: to change the size of the FormField, the `size` is proxied to the form control.
+
+## Usage
+
+```vue
+<UFormField
+  <!-- props here -->
+/>
+```