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/battery-half.svg

@@ -0,0 +1 @@
+<!-- Source: Font Awesome 6 --><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"><path d="M464 160c8.8 0 16 7.2 16 16V336c0 8.8-7.2 16-16 16H80c-8.8 0-16-7.2-16-16V176c0-8.8 7.2-16 16-16H464zM80 96C35.8 96 0 131.8 0 176V336c0 44.2 35.8 80 80 80H464c44.2 0 80-35.8 80-80V320c17.7 0 32-14.3 32-32V224c0-17.7-14.3-32-32-32V176c0-44.2-35.8-80-80-80H80zm208 96H96V320H288V192z"/></svg>