feat: groundwork for 'living the dream' mii submissions

Based on the screenshots from yesterday's Nintendo Direct, it is
presumed that the Mii editor in "Living the Dream" is similar to
Miitopia's one.

This commit lays the groundwork for Miis created in the sequel game.
However, due to the way TomodachiShare generates portraits of the Miis,
I can't do that unless there is a way to parse the QR code data and
render the Mii.

Note: I don't know if Nintendo will use access codes (as was the case
with Miitopia) therefore, as a precaution, another branch will be
created in anticipation for that.

prisma/migrations/20250913120915_switch_sequel/migration.sql

@@ -0,0 +1,9 @@
+-- CreateEnum
+CREATE TYPE "public"."MiiPlatform" AS ENUM ('SWITCH', 'THREE_DS');
+
+-- AlterTable
+ALTER TABLE "public"."miis" ADD COLUMN     "platform" "public"."MiiPlatform" NOT NULL DEFAULT 'THREE_DS',
+ALTER COLUMN "firstName" DROP NOT NULL,
+ALTER COLUMN "lastName" DROP NOT NULL,
+ALTER COLUMN "islandName" DROP NOT NULL,
+ALTER COLUMN "allowedCopying" DROP NOT NULL;

prisma/schema.prisma

@@ -68,18 +68,20 @@ model Session {
 }
 
 model Mii {
-  id          Int      @id @default(autoincrement())
-  userId      Int
-  name        String   @db.VarChar(64)
-  imageCount  Int      @default(0)
-  tags        String[]
-  description String?  @db.VarChar(256)
+  id     Int @id @default(autoincrement())
+  userId Int
 
-  firstName      String
-  lastName       String
+  name        String      @db.VarChar(64)
+  imageCount  Int         @default(0)
+  tags        String[]
+  description String?     @db.VarChar(256)
+  platform    MiiPlatform @default(THREE_DS)
+
+  firstName      String?
+  lastName       String?
   gender         MiiGender?
-  islandName     String
-  allowedCopying Boolean
+  islandName     String?
+  allowedCopying Boolean?
 
   createdAt DateTime @default(now())
 
@@ -153,6 +155,11 @@ model Punishment {
   @@map("punishments")
 }
 
+enum MiiPlatform {
+  SWITCH
+  THREE_DS // can't start with a number
+}
+
 enum MiiGender {
   MALE
   FEMALE