Major frontend code cleanup (#452)

Many large changes, including:
- TypeScript enums are now string unions throughout
- Strong type-checking throughout the TS and Vue codebase
- Vue component props now all specify `as PropType<...>`
- Usage of annotated return types on all functions
- Sorting of JS import statements
- Explicit usage of Vue bind attribute function call arguments (`@click="foo"` is now `@click=(e) => foo(e)`)
- Much improved code quality related to the color picker
- Consistent camelCase Vue bind and v-model attributes
- Consistent Vue HTML attribute strings with single quotes
- Bug fix and clarity improvement with incorrect hint class parameters
- Empty Vue component objects like `props: {}` and `components: {}` removed

frontend/src/components/widgets/labels/TextLabel.vue

@@ -20,13 +20,12 @@
 </style>
 
 <script lang="ts">
-import { defineComponent } from "vue";
+import { defineComponent, PropType } from "vue";
 
 export default defineComponent({
-	components: {},
 	props: {
-		bold: { type: Boolean, default: false },
-		italic: { type: Boolean, default: false },
+		bold: { type: Boolean as PropType<boolean>, default: false },
+		italic: { type: Boolean as PropType<boolean>, default: false },
 	},
 });
 </script>