feat: improve loading screen to be more like DOS

underneath the loading animation in the same vue component:

- [ ] add this text for desktop: `press any key to continue`
- [ ] add this text for mobile: `click anywhere to continue`
- [ ] add event handler for any global keypress that will close the loading dialog if it's open (use [vue-global-events](https://github.com/shentao/vue-global-events))
- [ ] have the text be animated so it's "typed" with a really old font to give the DOS kinda vibe

for inspiration see the http://poolside.fm loading screen

PS: Since we're already live, any new ticket is to be branched from `production` with branch name `pr-` and make a PR towards `production` again.
Also, remember we're using `npm` again now (as opposed to `yarn`).