feat(#27): Set up consola logger, make use of log levels in backend and frontend

legalconsenthub/index.d.ts

@@ -3,6 +3,20 @@ declare module 'nuxt/schema' {
     clientProxyBasePath: string
     serverApiBaseUrl: string
     serverApiBasePath: string
+    keycloakTokenUrl: string
+    logLevel: string
+  }
+}
+
+declare module '#app' {
+  interface NuxtApp {
+    $logger: import('consola').ConsolaInstance
+  }
+}
+
+declare module 'vue' {
+  interface ComponentCustomProperties {
+    $logger: import('consola').ConsolaInstance
   }
 }