feat: implement generic square (WIP)

src/generic/all.ts

@@ -0,0 +1,10 @@
+import { ForType } from '../core/Dispatcher.js'
+import { GenericReturn } from './type.js'
+import * as generic from './arithmetic.js'
+
+export { generic }
+
+declare module "../core/Dispatcher" {
+   interface ReturnTypes<Params>
+      extends ForType<'numbers', GenericReturn<Params>> { }
+}