Add One-to-Many Relationship with Definitions and Example Sentences (#12)

* add one to many relationship between definition and sentences

* change variable name to not match type name

* change sentence to example to match odict repo

Author: maxdemaio

prisma/schema.prisma

@@ -80,16 +80,20 @@ model Definition {
   text    String
   usageID BigInt?
   groupID BigInt?
+  examples Example[]
 
   Group Group? @relation(fields: [groupID], references: [id])
   Usage Usage? @relation(fields: [usageID], references: [id])
 
   @@map("definitions")
 }
 
-model Sentences {
+model Example {
   id   BigInt @id @default(autoincrement()) @db.BigInt
   text String
+  definitionID BigInt
 
-  @@map("sentences")
+  definition Definition @relation(fields: [definitionID], references: [id])
+
+  @@map("examples")
 }