First-launch settings config

[VirxEC]

Requires #56

• Slightly adjust events modal size for large screens
• Minor refactors to make this work
  • paths is now stored in App.svelte - will be useful later as Story Mode will also need this data (the welcome component is also stored in App.svelte
  • Refactor the botpack adding modal/logic into its own component
  • Refactor the LauncherSelector component to only contain the inner html (and logic), without the modal wrapper and button to open the modal.
  • Progress bar event listener has been moved to within the ProgressBar component

Upon first launch, this is what users see:

This will continue to show up upon launching the GUI until the user either closes the modal or downloads the botpack.
This is meant for users who open the GUI and close it without interacting with anything - this will still pop up again the next time.