Add menu options to teach Pikachu Surf and Fly

This implements functionality to teach Pikachu Surf and/or Fly and
extends existing widgets to help provide this functionality.

When a gen1 game is inserted, the user gets the choice to teach Pikachu
these moves.

This commit also restructures some of the Data and Style structs.

src/menu/MenuEntries.cpp

@@ -5,6 +5,16 @@ MenuItemData gen1MenuEntries[] = {
     {
         .title = "Event Pokémon",
         .onConfirmAction = goToGen1DistributionPokemonMenu
+    },
+    {
+        .title = "Teach Pikachu Surf",
+        .onConfirmAction = gen1PrepareToTeachPikachu,
+        .itemParam = &MOVE_SURF
+    },
+    {
+        .title = "Teach Pikachu Fly",
+        .onConfirmAction = gen1PrepareToTeachPikachu,
+        .itemParam = &MOVE_FLY
     }
 };