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/useBrowserLocation.md

@@ -0,0 +1,56 @@
+---
+category: Browser
+---
+
+# useBrowserLocation
+
+Reactive browser location
+
+> NOTE: If you're using Vue Router, use [`useRoute`](https://router.vuejs.org/guide/advanced/composition-api.html) provided by Vue Router instead.
+
+## Usage
+
+```ts
+import { useBrowserLocation } from '@vueuse/core'
+
+const location = useBrowserLocation()
+```
+
+## Component Usage
+
+```vue
+<UseBrowserLocation v-slot="location">
+  Browser Location: {{ location }}
+</UseBrowserLocation>
+```
+
+## Type Declarations
+
+```ts
+export interface UseBrowserLocationOptions extends ConfigurableWindow {}
+export interface BrowserLocationState {
+  readonly trigger: string
+  readonly state?: any
+  readonly length?: number
+  readonly origin?: string
+  hash?: string
+  host?: string
+  hostname?: string
+  href?: string
+  pathname?: string
+  port?: string
+  protocol?: string
+  search?: string
+}
+export type UseBrowserLocationReturn = Ref<BrowserLocationState>
+/**
+ * Reactive browser location.
+ *
+ * @see https://vueuse.org/useBrowserLocation
+ *
+ * @__NO_SIDE_EFFECTS__
+ */
+export declare function useBrowserLocation(
+  options?: UseBrowserLocationOptions,
+): UseBrowserLocationReturn
+```