feat: tentatively improve performance by caching paths in the router scope

Author: fredericoo

.changeset/curly-tables-search.md

@@ -0,0 +1,5 @@
+---
+'react-router-typesafe': patch
+---
+
+`typesafeBrowserRouter`: cache union of all paths in router scope

src/browser-router.ts

@@ -37,7 +37,9 @@ const joinValidWith =
 		valid.filter(Boolean).join(separator);
 
 export const typesafeBrowserRouter = <R extends RouteObject>(routes: NarrowArray<R>) => {
-	function href<P extends ExtractPaths<R>>(
+	type Paths = ExtractPaths<R>;
+
+	function href<P extends Paths>(
 		params: { path: Extract<P, string> } & PathParams<Flatten<ExtractParams<P>>> & RouteExtraParams,
 	) {
 		// applies all params to the path