household address: show js error messages

src/Bundle/ChillPersonBundle/Resources/public/vuejs/HouseholdAddress/App.vue

@@ -17,6 +17,9 @@
             {{ newAddress.postcode.name }}
          </div>
       </div>
+      <div v-if="errors.length > 0">
+         {{ errors }}
+      </div>
    </div>
    <div>
       <button class="sc-button bt-create centered mt-4" @click="addToHousehold">
@@ -45,6 +48,9 @@ export default {
       newAddress() {
          return this.$store.state.newAddress;
       },
+      errors() {
+         return this.$store.state.errorMsg;
+      }
    },
    methods: {
       addNewAddress({ address, modal }) {