feat: genre and album populate and CRUD

back/prisma/schema.prisma

@@ -43,12 +43,14 @@ model Artist {
     name String @unique
 
     Song Song[]
+    Album Album[]
 }
 
 model Album {
     id   Int    @id @default(autoincrement())
     name String @unique
-
+    artistId     Int?
+    artist       Artist? @relation(fields: [artistId], references: [id])
     Song Song[]
 }