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/reactifyObject.md

@@ -0,0 +1,62 @@
+---
+category: Reactivity
+---
+
+# reactifyObject
+
+Apply `reactify` to an object
+
+## Usage
+
+```ts
+import { reactifyObject } from '@vueuse/core'
+
+const reactifiedConsole = reactifyObject(console)
+
+const a = ref('42')
+
+reactifiedConsole.log(a) // no longer need `.value`
+```
+
+## Type Declarations
+
+```ts
+export type ReactifyNested<
+  T,
+  Keys extends keyof T = keyof T,
+  S extends boolean = true,
+> = {
+  [K in Keys]: T[K] extends AnyFn ? Reactified<T[K], S> : T[K]
+}
+export type ReactifyObjectReturn<
+  T,
+  Keys extends keyof T,
+  S extends boolean = true,
+> = ReactifyNested<T, Keys, S>
+export interface ReactifyObjectOptions<
+  T extends boolean,
+> extends ReactifyOptions<T> {
+  /**
+   * Includes names from Object.getOwnPropertyNames
+   *
+   * @default true
+   */
+  includeOwnProperties?: boolean
+}
+/**
+ * Apply `reactify` to an object
+ *
+ * @__NO_SIDE_EFFECTS__
+ */
+export declare function reactifyObject<T extends object, Keys extends keyof T>(
+  obj: T,
+  keys?: (keyof T)[],
+): ReactifyObjectReturn<T, Keys, true>
+export declare function reactifyObject<
+  T extends object,
+  S extends boolean = true,
+>(
+  obj: T,
+  options?: ReactifyObjectOptions<S>,
+): ReactifyObjectReturn<T, keyof T, S>
+```