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/logicNot.md

@@ -0,0 +1,36 @@
+---
+category: '@Math'
+alias: not
+---
+
+# logicNot
+
+`NOT` condition for ref.
+
+## Usage
+
+```ts
+import { whenever } from '@vueuse/core'
+import { logicNot } from '@vueuse/math'
+
+const a = ref(true)
+
+whenever(logicNot(a), () => {
+  console.log('a is now falsy!')
+})
+```
+
+## Type Declarations
+
+```ts
+/**
+ * `NOT` conditions for refs.
+ *
+ * @see https://vueuse.org/logicNot
+ *
+ * @__NO_SIDE_EFFECTS__
+ */
+export declare function logicNot(v: MaybeRefOrGetter<any>): ComputedRef<boolean>
+/** @deprecated use `logicNot` instead */
+export declare const not: typeof logicNot
+```