feat: Add first modifications to uncaught/unseen checkboxes

[Hybris95]

This Pull Request might have to be merged into another branch (not main) because it is unfinished.

Work to do before fully finishing the work :

• Resize PokeFinder window to hold the 2 new checkboxes (might have to rework the background asset)
  (com.metacontent.cobblenav.client.gui.screen.pokefinder.PokefinderScreen)
• Finish the functionality of how to filter found pokemons (seen/captured) maybe from Pokedex of the current client ?
  (com.metacontent.cobblenav.client.settings.PokefinderSettings)

[Hybris95]

Closes issue #29

[gatekeep06]

Changing the ui isn't that much of a problem. It would be a huge help if you could find a not too resource-consuming way to check the player's pokemon knowledge on the client (none, seen, caight)