Add experiments folder. Add usage.md and SKILL.md. Fix Sheet interactions and add dynamic sheet mode.

experiments/router-guard-history/vite.config.ts

@@ -0,0 +1,6 @@
+import vue from "@vitejs/plugin-vue";
+import { defineConfig } from "vite";
+
+export default defineConfig({
+  plugins: [vue()],
+});