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/useDebouncedRefHistory.md

@@ -0,0 +1,40 @@
+---
+category: State
+related:
+  - useRefHistory
+  - useThrottledRefHistory
+---
+
+# useDebouncedRefHistory
+
+Shorthand for `useRefHistory` with debounced filter.
+
+## Usage
+
+This function takes a snapshot of your counter after 1000ms when the value of it starts to change.
+
+```ts
+import { useDebouncedRefHistory } from '@vueuse/core'
+import { shallowRef } from 'vue'
+
+const counter = shallowRef(0)
+const { history, undo, redo } = useDebouncedRefHistory(counter, { deep: true, debounce: 1000 })
+```
+
+## Type Declarations
+
+```ts
+/**
+ * Shorthand for [useRefHistory](https://vueuse.org/useRefHistory) with debounce filter.
+ *
+ * @see https://vueuse.org/useDebouncedRefHistory
+ * @param source
+ * @param options
+ */
+export declare function useDebouncedRefHistory<Raw, Serialized = Raw>(
+  source: Ref<Raw>,
+  options?: Omit<UseRefHistoryOptions<Raw, Serialized>, "eventFilter"> & {
+    debounce?: MaybeRefOrGetter<number>
+  },
+): UseRefHistoryReturn<Raw, Serialized>
+```