Added public initializers to the chat datatypes, so they can be const…

…ructed outside the package as intended.

Sources/CleverBird/chat/datatypes.swift

@@ -9,6 +9,24 @@ public struct ChatCompletionRequest: Codable {
     public let frequencyPenalty: Penalty?
     public let user: String?
     public let messages: [ChatMessage]
+
+    public init(model: Model,
+                temperature: Percentage,
+                topP: Percentage? = nil,
+                stop: [String]? = nil,
+                presencePenalty: Penalty? = nil,
+                frequencyPenalty: Penalty? = nil,
+                user: String? = nil,
+                messages: [ChatMessage]) {
+        self.model = model
+        self.temperature = temperature
+        self.topP = topP
+        self.stop = stop
+        self.presencePenalty = presencePenalty
+        self.frequencyPenalty = frequencyPenalty
+        self.user = user
+        self.messages = messages
+    }
 }
 
 public struct ChatMessage: Codable {
@@ -19,4 +37,10 @@ public struct ChatMessage: Codable {
     }
     public let role: Role
     public let content: String
+
+    public init(role: Role,
+                content: String) {
+        self.role = role
+        self.content = content
+    }
 }