feat: add character sheet panel with guild info

Adds pronouns, guildName, and guildDescription fields to the player
profile. A new Character tab provides an in-game view/edit panel for
character and guild lore.

Closes #16

apps/api/prisma/schema.prisma

@@ -13,9 +13,12 @@ model Player {
   username        String
   discriminator   String
   avatar          String?
-  characterName   String  @default("")
-  bio             String  @default("")
-  profileSettings Json?
+  characterName     String  @default("")
+  pronouns          String  @default("")
+  bio               String  @default("")
+  guildName         String  @default("")
+  guildDescription  String  @default("")
+  profileSettings   Json?
   createdAt       Float
   lastSavedAt     Float
   totalGoldEarned              Float @default(0)