feat: adds type aliases (#11)

Author: kevinhermawan

Sources/LLMChatOpenAI/LLMChatOpenAI+Typealias.swift

@@ -0,0 +1,15 @@
+//
+//  LLMChatOpenAI+Typealias.swift
+//  LLMChatOpenAI
+//
+//  Created by Kevin Hermawan on 10/27/24.
+//
+
+import Foundation
+
+public extension LLMChatOpenAI {
+    typealias Completion = ChatCompletion
+    typealias CompletionChunk = ChatCompletionChunk
+    typealias Message = ChatMessage
+    typealias Options = ChatOptions
+}