Add basic loading of older posts

src/lib/components/LoadMoreComponent.svelte

@@ -0,0 +1,11 @@
+<script>
+    import { createEventDispatcher } from 'svelte';
+
+    const dispatch = createEventDispatcher();
+
+    function loadOlderPosts() {
+        dispatch('loadOlderPosts');
+    }
+</script>
+
+<button on:click={loadOlderPosts}>Load More</button>