refac: SammoAPI Path 정의에 NumVar, StrVar 추가

hwe/ts/util/APIPathGen.d.ts

@@ -1 +1,19 @@
-export function APIPathGen<T>(obj: T, callback: (path: string[])=>unknown): T;
+export function APIPathGen<T>(obj: T, callback: (path: string[])=>unknown): T;
+
+export function StrVar<PathType extends string>(): <NextCall>(next: NextCall)=>{
+    [v in PathType]: NextCall
+};
+
+export function NumVar<NextCall>(next: NextCall):{
+    [v: number]: NextCall
+};
+
+/*
+const apiPath = {
+    SomePath: someFunc,
+    User: StrVar<'a'|'b'>()({
+        Update: someFunc,
+        Delete: someFunc,
+    })
+}
+*/