feat: move button into own component

frontend/src/lib/components/button/Submit.svelte

@@ -0,0 +1,14 @@
+<script lang="ts">
+	export let value: string;
+</script>
+
+<input on:click type="submit" {value} />
+
+<style>
+	input {
+		@apply bg-sspsBlue hover:bg-sspsBlueDark 
+        @apply rounded-lg p-3 text-xl font-semibold text-white 
+        @apply transition-colors duration-300;
+        @apply w-full;
+	}
+</style>