Implements Hunt basic create and get, and adds field validation to controllers

src/main/kotlin/net/halfbinary/scavengerhuntapi/model/domain/Hunter.kt

@@ -1,9 +1,10 @@
 package net.halfbinary.scavengerhuntapi.model.domain
 
-import java.util.UUID
+import net.halfbinary.scavengerhuntapi.model.HunterId
+import java.util.*
 
 data class Hunter(
-    val id: UUID = UUID.randomUUID(),
+    val id: HunterId = UUID.randomUUID(),
     val email: String,
     val name: String,
     val password: String,