Fixed cards rarities and added cards description and stage (#62)

Signed-off-by: Avior <florian.bouillon@delta-wings.net>

data/Sword & Shield/Sword & Shield/78.ts

@@ -64,6 +64,10 @@ const card: Card = {
 		reverse: true,
 		holo: false,
 		firstEdition: false
+	},
+
+	description: {
+		en: "As it eats the seeds stored up in its pocket-like pouches, this Pokémon is not just satisfying its constant hunger. It’s also generating electricity."
 	}
 }