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/input-number.md

@@ -0,0 +1,21 @@
+# InputNumber
+
+An input for numerical values with a customizable range.
+
+## Key Props
+
+- `step`: to set the step value of the InputNumber.
+- `orientation`: to change the orientation of the InputNumber.
+- `placeholder`: to set a placeholder text.
+- `color`: to change the ring color when the InputNumber is focused.
+- `variant`: to change the variant of the InputNumber.
+- `size`: to change the size of the InputNumber.
+- `disabled`: to disable the InputNumber.
+
+## Usage
+
+```vue
+<UInputNumber
+  <!-- props here -->
+/>
+```