fix: Set loader: { '.wasm': 'copy' } in esbuild config in adapter-cloudflare (#9909)

Copies WASM files in Cloudflare instead of trying to load them. Closes #9890.

Author: elliott-with-the-longest-name-on-github

.changeset/honest-news-hunt.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-cloudflare': patch
+---
+
+fix: Copy .wasm files during build

packages/adapter-cloudflare/index.js

@@ -54,7 +54,10 @@ export default function (options = {}) {
 				outfile: `${dest}/_worker.js`,
 				allowOverwrite: true,
 				format: 'esm',
-				bundle: true
+				bundle: true,
+				loader: {
+					'.wasm': 'copy'
+				}
 			});
 		}
 	};