Added app bar

Small refactor

src/views/Forecast.vue

@@ -0,0 +1,13 @@
+<template>
+  <v-card flat tile>
+    <v-card-title>Prognoza pogody</v-card-title>
+  </v-card>
+</template>
+
+<script lang="ts">
+import { Component, Vue } from "vue-property-decorator";
+
+@Component
+export default class Forecast extends Vue {
+}
+</script>