fix(striker-ui): add string wrapper function

striker-ui/lib/sxstring.ts

@@ -0,0 +1,14 @@
+import { ReactNode, createElement } from 'react';
+
+/**
+ * "jsx"/"tsx" + "string"; wraps input with wrapper if input is a string.
+ */
+const sxstring = (
+  children: ReactNode,
+  wrapper: CreatableComponent,
+): ReactNode =>
+  typeof children === 'string'
+    ? createElement(wrapper, null, children)
+    : children;
+
+export default sxstring;