Fix windows build issue with import alias

.changeset/spicy-beds-boil.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fixes a Windows-specific build issue when importing an Astro component with a `<script>` tag using an import alias.

packages/astro/src/vite-plugin-config-alias/index.ts

@@ -91,7 +91,7 @@ const getViteResolveAlias = (settings: AstroSettings) => {
 				for (const resolvedValue of resolvedValues) {
 					const resolved = resolvedValue.replace('*', id);
 					if (fs.existsSync(resolved)) {
-						return resolved;
+						return normalizePath(resolved);
 					}
 				}
 				return null;

packages/astro/test/fixtures/alias-tsconfig/src/components/Qux.astro

@@ -0,0 +1,5 @@
+<p>qux</p>
+
+<script>
+  console.log('Hello from Qux');
+</script>

packages/astro/test/fixtures/alias-tsconfig/src/pages/index.astro

@@ -1,6 +1,7 @@
 ---
 import Alias from '@components/Alias.svelte';
 import Client from '@components/Client.svelte'
+import Qux from '@components/Qux.astro'
 import '@styles/main.css';
 import { namespace } from '@test/namespace-package'
 import Foo from 'src/components/Foo.astro';
@@ -23,6 +24,7 @@ const globResult = Object.keys(import.meta.glob('@components/glob/*.js')).join('
       <Foo />
 			<Bar />
       <Baz />
+      <Qux />
       <StyleComp />
       <Alias client:load />
       <p id="namespace">{namespace}</p>