feat(projects): render preview in top screen, also prepare for markdown rendering

app/components/Projects/TopScreen/Background.vue

@@ -0,0 +1,13 @@
+<script setup lang="ts">
+import BACKGROUND_IMAGE from "/assets/images/projects/top-screen/background.webp";
+
+const [backgroundImage] = useImages(BACKGROUND_IMAGE);
+
+useRender((ctx) => {
+  ctx.drawImage(backgroundImage!, 0, 0);
+});
+
+defineOptions({
+  render: () => null,
+});
+</script>