Breaking change fix - writeStatic is deprecated

Have writeClient write both the client and static files and remove writeStatic. This is a breaking change for adapter authors.

[breaking] remove writeStatic to align with Vite #5618
sveltejs/kit#5618

Author: elron

index.js

@@ -42,7 +42,6 @@ export default function ({
 			builder.rimraf(assets)
 			builder.rimraf(pages)
 
-			builder.writeStatic(assets)
 			builder.writeClient(assets)
 			builder.writePrerendered(pages, { fallback })