Implement new UI component for icons #230

- Introduce `AppIcon.vue`, offering improved performance over the
  previous `fort-awesome` dependency. This implementation reduces bundle
  size by 67.31KB (tested for web using `npm run build -- --mode prod`).
- Migrate Font Awesome 5 icons to Font Awesome 6.

This commit facilitates migration to Vue 3.0 (#230) and ensures no Vue
component remains tightly bound to a specific Vue version, enhancing
code portability.

Font Awesome license is not included because Font Awesome revokes its
right:

> "Attribution is no longer required as of Font Awesome 3.0"
>
> Sources:
>
> - https://fontawesome.com/v4/license/ (archived: https://web.archive.org/web/20231003213441/https://fontawesome.com/v4/license/, https://archive.ph/Yy9j5)
> - https://github.com/FortAwesome/Font-Awesome/wiki (archived: https://web.archive.org/web/20231003214646/https://github.com/FortAwesome/Font-Awesome/wiki, https://archive.ph/C6sXv)

This commit removes following third-party production dependencies:

- `@fortawesome/vue-fontawesome`
- `@fortawesome/free-solid-svg-icons`
- `@fortawesome/free-regular-svg-icons`
- `@fortawesome/free-brands-svg-icons`
- `@fortawesome/fontawesome-svg-core`

src/presentation/assets/icons/left-right.svg

@@ -0,0 +1 @@
+<!-- Source: Font Awesome 6 --><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M504.3 273.6c4.9-4.5 7.7-10.9 7.7-17.6s-2.8-13-7.7-17.6l-112-104c-7-6.5-17.2-8.2-25.9-4.4s-14.4 12.5-14.4 22l0 56-192 0 0-56c0-9.5-5.7-18.2-14.4-22s-18.9-2.1-25.9 4.4l-112 104C2.8 243 0 249.3 0 256s2.8 13 7.7 17.6l112 104c7 6.5 17.2 8.2 25.9 4.4s14.4-12.5 14.4-22l0-56 192 0 0 56c0 9.5 5.7 18.2 14.4 22s18.9 2.1 25.9-4.4l112-104z"/></svg>