docs: add advanced skills for Vitest, Pinia, and Vue built-ins

Add comprehensive reference documentation for:
- Vitest: environments, projects/workspaces, type testing, vi utilities
- Pinia: HMR, Nuxt integration, SSR setup
- Vue: built-in components (Transition, Teleport, Suspense, KeepAlive) and advanced directives

.agents/skills/vueuse-functions/references/useRouteQuery.md

@@ -0,0 +1,79 @@
+---
+category: '@Router'
+---
+
+# useRouteQuery
+
+Shorthand for a reactive `route.query`. Updates the URL query parameters when the ref changes.
+
+## Usage
+
+```ts
+import { useRouteQuery } from '@vueuse/router'
+
+const search = useRouteQuery('search')
+
+const search = useRouteQuery('search', 'foo') // or with a default value
+
+const page = useRouteQuery('page', '1', { transform: Number }) // or transforming value
+
+console.log(search.value) // route.query.search
+search.value = 'foobar' // router.replace({ query: { search: 'foobar' } })
+```
+
+### Navigation Mode
+
+By default, changes use `router.replace()`. Set `mode: 'push'` to use `router.push()` instead.
+
+```ts
+import { useRouteQuery } from '@vueuse/router'
+
+const search = useRouteQuery('search', '', { mode: 'push' })
+```
+
+### Bidirectional Transform
+
+You can provide separate `get` and `set` transforms for reading and writing values.
+
+```ts
+import { useRouteQuery } from '@vueuse/router'
+
+const filters = useRouteQuery('filters', [], {
+  transform: {
+    get: v => v ? v.split(',') : [],
+    set: v => v.join(','),
+  },
+})
+
+// Reading: 'a,b,c' -> ['a', 'b', 'c']
+// Writing: ['a', 'b', 'c'] -> 'a,b,c'
+```
+
+### Default Value Behavior
+
+When the value equals the default value, the query parameter is removed from the URL.
+
+```ts
+import { useRouteQuery } from '@vueuse/router'
+
+const page = useRouteQuery('page', '1')
+
+page.value = '2' // URL: ?page=2
+page.value = '1' // URL: (no page param, since it equals default)
+```
+
+## Type Declarations
+
+```ts
+export declare function useRouteQuery(
+  name: string,
+): Ref<undefined | null | string | string[]>
+export declare function useRouteQuery<
+  T extends RouteQueryValueRaw = RouteQueryValueRaw,
+  K = T,
+>(
+  name: string,
+  defaultValue?: MaybeRefOrGetter<T>,
+  options?: ReactiveRouteOptionsWithTransform<T, K>,
+): Ref<K>
+```