Add TypeScript definitions via pg-to-ts and refactor migrations

web-app/src/lib/templates/common/Footer.svelte

@@ -1,11 +1,16 @@
 <script lang="ts">
-  const { text, isIndexPage = true }: { text: string; isIndexPage?: boolean } = $props();
+  import type { WebsiteOverview } from "../../utils";
+
+  const {
+    websiteOverview,
+    isIndexPage
+  }: { websiteOverview: WebsiteOverview; isIndexPage: boolean } = $props();
 </script>
 
 <footer>
   <div class="container">
     <small>
-      {@html text.replace(
+      {@html websiteOverview.footer.additional_text.replace(
         "!!legal",
         `<a href="${isIndexPage ? "./legal-information" : "../legal-information"}">Legal information</a>`
       )}