feat: openapi-fetch typing

feat: base page layout for implementation

todo: fix light/dark mode toggling

web/src/components/Footer.svelte

@@ -0,0 +1,10 @@
+<script lang="ts">
+	import LightDarkMode from './LightDarkMode.svelte';
+</script>
+
+<footer class="border-t border-surface-300-600 bg-surface-100-800">
+	<div class="mx-auto flex w-full max-w-7xl items-center justify-between px-4 py-6 text-sm text-surface-700-300">
+		<span>Stocklet</span>
+		<LightDarkMode />
+	</div>
+</footer>