feat: add new exercises for discovery and solutions, including problem and solution implementations

Author: kentcdodds

exercises/01.discovery/01.problem.cors/README.mdx

@@ -0,0 +1 @@
+# CORS

…s/01.start/01.solution/package-lock.json …covery/01.problem.cors/package-lock.jsonexercises/01.start/01.solution/package-lock.json renamed to exercises/01.discovery/01.problem.cors/package-lock.json exercises/01.start/01.solution/package-lock.json renamed to exercises/01.discovery/01.problem.cors/package-lock.json

@@ -1,5 +1,5 @@
 {
-  "name": "exercises_03.initialize-flow_01.problem",
+  "name": "exercises_01.discovery_01.problem.cors",
   "private": true,
   "type": "module",
   "scripts": {

….initialize-flow/01.problem/package.json …1.discovery/01.problem.cors/package.jsonexercises/03.initialize-flow/01.problem/package.json renamed to exercises/01.discovery/01.problem.cors/package.json exercises/03.initialize-flow/01.problem/package.json renamed to exercises/01.discovery/01.problem.cors/package.json

@@ -15,12 +15,11 @@ export function withCors({
 
 		// Handle CORS preflight requests
 		if (request.method === 'OPTIONS') {
-			return new Response(null, {
-				status: 204,
-				headers: mergeHeaders(corsHeaders, {
-					'Access-Control-Max-Age': '86400',
-				}),
+			const headers = mergeHeaders(corsHeaders, {
+				'Access-Control-Max-Age': '86400',
 			})
+
+			return new Response(null, { status: 204, headers })
 		}
 
 		// Call the original handler