Refactor Vue components using Composition API #230

- Migrate `StatefulVue`:
  - Introduce `UseCollectionState` that replaces its behavior and acts
    as a shared state store.
  - Add more encapsulated, granular functions based on read or write
    access to state in CollectionState.
- Some linting rules get activates due to new code-base compability to
  modern parses, fix linting errors.
  - Rename Dialog to ModalDialog as after refactoring,
    eslintvue/no-reserved-component-names does not allow name Dialog.
  - To comply with `vue/multi-word-component-names`, rename:
    - `Code`          -> `CodeInstruction`
    - `Handle`        -> `SliderHandle`
    - `Documentable`  -> `DocumentableNode`
    - `Node`          -> `NodeContent`
    - `INode`         -> `INodeContent`
    - `Responsive`    -> `SizeObserver`
- Remove `vue-property-decorator` and `vue-class-component`
  dependencies.
- Refactor `watch` with computed properties when possible for cleaner
  code.
  - Introduce `UseApplication` to reduce repeated code in new components
    that use `computed` more heavily than before.
- Change TypeScript target to `es2017` to allow top level async calls
  for getting application context/state/instance to simplify the code by
  removing async calls. However, mocha (unit and integration) tests do
  not run with top level awaits, so a workaround is used.

src/presentation/components/TheHeader.vue

@@ -1,26 +1,27 @@
 <template>
   <div id="container">
     <h1 class="child title">{{ title }}</h1>
-    <h2 class="child subtitle">Now you have the choice</h2>
+    <h2 class="child subtitle">{{ subtitle }}</h2>
   </div>
 </template>
 
 <script lang="ts">
-import { Component, Vue } from 'vue-property-decorator';
-import { ApplicationFactory } from '@/application/ApplicationFactory';
+import { defineComponent, computed } from 'vue';
+import { useApplication } from '@/presentation/components/Shared/Hooks/UseApplication';
 
-@Component
-export default class TheHeader extends Vue {
-  public title = '';
+export default defineComponent({
+  setup() {
+    const { info } = useApplication();
 
-  public subtitle = '';
+    const title = computed(() => info.name);
+    const subtitle = computed(() => info.slogan);
 
-  public async created() {
-    const app = await ApplicationFactory.Current.getApp();
-    this.title = app.info.name;
-    this.subtitle = app.info.slogan;
-  }
-}
+    return {
+      title,
+      subtitle,
+    };
+  },
+});
 </script>
 
 <style scoped lang="scss">