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/editor-mention-menu.md

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+# EditorMentionMenu
+
+A mention menu that displays user suggestions when typing the @ character in the editor.
+
+## Key Props
+
+- `items`: as an array of objects with the following properties:
+
+- `label: string`{lang="ts-type"}
+- `avatar?: AvatarProps`{lang="ts-type"}
+- `icon?: string`{lang="ts-type"}
+- `description?: string`{lang="ts-type"}
+- `disabled?: boolean`{lang="ts-type"}
+
+## ::component-example
+
+elevated: true
+collapse: true
+name: 'editor-mention-menu-items-example'
+class: 'p-8'
+
+---
+
+::
+
+::note
+You can also pass an array of arrays to the `items` prop to create separated groups of items.
+
+- `char`: to change the trigger character.
+- `options`: to customize the positioning behavior using [Floating UI options](https://floating-ui.
+
+## Usage
+
+```vue
+<UEditorMentionMenu
+  <!-- props here -->
+/>
+```