feat: add race/class to character sheet, public /character/:id page

Players can now set their character's race and class in the Character
tab. A new public page at /character/:id displays the full character
sheet — name, pronouns, race, class, bio, and guild lore.

apps/api/prisma/schema.prisma

@@ -15,6 +15,8 @@ model Player {
   avatar          String?
   characterName     String  @default("")
   pronouns          String  @default("")
+  characterRace     String  @default("")
+  characterClass    String  @default("")
   bio               String  @default("")
   guildName         String  @default("")
   guildDescription  String  @default("")