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/usePointer.md

@@ -0,0 +1,91 @@
+---
+category: Sensors
+---
+
+# usePointer
+
+Reactive [pointer state](https://developer.mozilla.org/en-US/docs/Web/API/Pointer_events).
+
+## Basic Usage
+
+```ts
+import { usePointer } from '@vueuse/core'
+
+const { x, y, pressure, pointerType } = usePointer()
+```
+
+## Component Usage
+
+By default, the component will track the pointer on `window`
+
+```vue
+<template>
+  <UsePointer v-slot="{ x, y }">
+    x: {{ x }}
+    y: {{ y }}
+  </UsePointer>
+</template>
+```
+
+To track local position in the element, set `target="self"`:
+
+```vue
+<template>
+  <UsePointer v-slot="{ x, y }" target="self">
+    x: {{ x }} y: {{ y }}
+  </UsePointer>
+</template>
+```
+
+## Type Declarations
+
+```ts
+export interface UsePointerState extends Position {
+  pressure: number
+  pointerId: number
+  tiltX: number
+  tiltY: number
+  width: number
+  height: number
+  twist: number
+  pointerType: PointerType | null
+}
+export interface UsePointerOptions extends ConfigurableWindow {
+  /**
+   * Pointer types that listen to.
+   *
+   * @default ['mouse', 'touch', 'pen']
+   */
+  pointerTypes?: PointerType[]
+  /**
+   * Initial values
+   */
+  initialValue?: MaybeRef<Partial<UsePointerState>>
+  /**
+   * @default window
+   */
+  target?: MaybeRef<EventTarget | null | undefined> | Document | Window
+}
+export interface UsePointerReturn {
+  pressure: Ref<number>
+  pointerId: Ref<number>
+  tiltX: Ref<number>
+  tiltY: Ref<number>
+  width: Ref<number>
+  height: Ref<number>
+  twist: Ref<number>
+  pointerType: Ref<PointerType | null>
+  x: Ref<number>
+  y: Ref<number>
+  isInside: ShallowRef<boolean>
+}
+/**
+ * Reactive pointer state.
+ *
+ * @see https://vueuse.org/usePointer
+ * @param options
+ */
+export declare function usePointer(
+  options?: UsePointerOptions,
+): UsePointerReturn
+```