Implement Universal-Store [UniStore] 3DS side. (#13)

* WIP App store. ;P

* Make the FileBrowse look like Scripts Screen.

* Add *all* Script Functions for the App Store.

* WIP; Store Selection & Store Screen.

To-Do: Big cleanup and remove of duplicate stuff.

* Some UniStore work.

* :bigBruh:.

* Add Spritesheet with Icon support.

* Add a Store Prepare message, just in case it takes longer.

* ~~Not really Camera stuff, just UniStore work.~~ (#12)

* We don't want Nightly builds here.

* Add UniStore Icon.

* New banner by https://github.com/TotallyNotGuy

* Add Buttons for a prompt & update icon.

* Update README.md to be more descriptive and stuff

* Update README.md

* Add updating the spritesheet too.

* Only update stores, if needed things exist!

* Make Storepath changeable.

* Change App Description.

* Display `Title` as well.

* You can now download .unistore files by entering a URL!

Co-authored-by: FlameKat53 <flame9804@yahoo.com>

* This should fix all warnings.

Also add posX and posY for the Icons in UniStore.

* Last changes for UniStore.

Co-authored-by: FlameKat53 <flame9804@yahoo.com>

assets/gfx/sprites.t3s

@@ -8,6 +8,9 @@ sprites/top_screen_bot.png
 sprites/top_screen_top.png
 sprites/search.png
 sprites/side_arrow.png
+sprites/uniStore.png
+sprites/uniStore_HD.png
+sprites/update.png
 sprites/view.png
 
 sprites/credits/discord.png