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/useMousePressed.md

@@ -0,0 +1,116 @@
+---
+category: Sensors
+---
+
+# useMousePressed
+
+Reactive mouse pressing state. Triggered by `mousedown` `touchstart` on target element and released by `mouseup` `mouseleave` `touchend` `touchcancel` on window.
+
+## Basic Usage
+
+```ts
+import { useMousePressed } from '@vueuse/core'
+
+const { pressed } = useMousePressed()
+```
+
+Touching is enabled by default. To make it only detects mouse changes, set `touch` to `false`
+
+```ts
+import { useMousePressed } from '@vueuse/core'
+// ---cut---
+const { pressed } = useMousePressed({ touch: false })
+```
+
+To only capture `mousedown` and `touchstart` on specific element, you can specify `target` by passing a ref of the element.
+
+```vue
+<script setup lang="ts">
+import { useMousePressed } from '@vueuse/core'
+// ---cut---
+import { useTemplateRef } from 'vue'
+
+const el = useTemplateRef('el')
+
+const { pressed } = useMousePressed({ target: el })
+</script>
+
+<template>
+  <div ref="el">
+    Only clicking on this element will trigger the update.
+  </div>
+</template>
+```
+
+## Component Usage
+
+```vue
+<template>
+  <UseMousePressed v-slot="{ pressed }">
+    Is Pressed: {{ pressed }}
+  </UseMousePressed>
+</template>
+```
+
+## Type Declarations
+
+```ts
+export interface UseMousePressedOptions extends ConfigurableWindow {
+  /**
+   * Listen to `touchstart` `touchend` events
+   *
+   * @default true
+   */
+  touch?: boolean
+  /**
+   * Listen to `dragstart` `drop` and `dragend` events
+   *
+   * @default true
+   */
+  drag?: boolean
+  /**
+   * Add event listeners with the `capture` option set to `true`
+   * (see [MDN](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#capture))
+   *
+   * @default false
+   */
+  capture?: boolean
+  /**
+   * Initial values
+   *
+   * @default false
+   */
+  initialValue?: boolean
+  /**
+   * Element target to be capture the click
+   */
+  target?: MaybeComputedElementRef
+  /**
+   * Callback to be called when the mouse is pressed
+   *
+   * @param event
+   */
+  onPressed?: (event: MouseEvent | TouchEvent | DragEvent) => void
+  /**
+   * Callback to be called when the mouse is released
+   *
+   * @param event
+   */
+  onReleased?: (event: MouseEvent | TouchEvent | DragEvent) => void
+}
+/** @deprecated use {@link UseMousePressedOptions} instead */
+export type MousePressedOptions = UseMousePressedOptions
+export interface UseMousePressedReturn {
+  pressed: ShallowRef<boolean>
+  sourceType: ShallowRef<UseMouseSourceType>
+}
+/**
+ * Reactive mouse pressing state.
+ *
+ * @see https://vueuse.org/useMousePressed
+ * @param options
+ */
+export declare function useMousePressed(
+  options?: UseMousePressedOptions,
+): UseMousePressedReturn
+```