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/usePermission.md

@@ -0,0 +1,78 @@
+---
+category: Browser
+---
+
+# usePermission
+
+Reactive [Permissions API](https://developer.mozilla.org/en-US/docs/Web/API/Permissions_API). The Permissions API provides the tools to allow developers to implement a better user experience as far as permissions are concerned.
+
+## Usage
+
+```ts
+import { usePermission } from '@vueuse/core'
+
+const microphoneAccess = usePermission('microphone')
+```
+
+## Type Declarations
+
+```ts
+type DescriptorNamePolyfill =
+  | "accelerometer"
+  | "accessibility-events"
+  | "ambient-light-sensor"
+  | "background-sync"
+  | "camera"
+  | "clipboard-read"
+  | "clipboard-write"
+  | "gyroscope"
+  | "magnetometer"
+  | "microphone"
+  | "notifications"
+  | "payment-handler"
+  | "persistent-storage"
+  | "push"
+  | "speaker"
+  | "local-fonts"
+export type GeneralPermissionDescriptor =
+  | PermissionDescriptor
+  | {
+      name: DescriptorNamePolyfill
+    }
+export interface UsePermissionOptions<
+  Controls extends boolean,
+> extends ConfigurableNavigator {
+  /**
+   * Expose more controls
+   *
+   * @default false
+   */
+  controls?: Controls
+}
+export type UsePermissionReturn = Readonly<
+  ShallowRef<PermissionState | undefined>
+>
+export interface UsePermissionReturnWithControls extends Supportable {
+  state: UsePermissionReturn
+  query: () => Promise<PermissionStatus | undefined>
+}
+/**
+ * Reactive Permissions API.
+ *
+ * @see https://vueuse.org/usePermission
+ *
+ * @__NO_SIDE_EFFECTS__
+ */
+export declare function usePermission(
+  permissionDesc:
+    | GeneralPermissionDescriptor
+    | GeneralPermissionDescriptor["name"],
+  options?: UsePermissionOptions<false>,
+): UsePermissionReturn
+export declare function usePermission(
+  permissionDesc:
+    | GeneralPermissionDescriptor
+    | GeneralPermissionDescriptor["name"],
+  options: UsePermissionOptions<true>,
+): UsePermissionReturnWithControls
+```