Fix twoslash types issue

Author: marlonicus

docs/tsconfig.json

@@ -13,7 +13,8 @@
   },
   "include": [
     "docs/**/*",
-    "src/**/*"
+    "src/**/*",
+    "types/**/*"
   ],
   "exclude": [
     "node_modules",

docs/types/fast-elements.d.ts

@@ -0,0 +1,7 @@
+// Type definitions for fast-* JSX elements used in documentation examples
+// This ensures TypeScript recognizes these elements during twoslash compilation
+
+import '@react-facet/dom-fiber'
+
+// The types are already declared globally in @react-facet/dom-fiber
+// This file just ensures they're loaded during docs compilation