Refactor: Reorganize project structure by moving core components into dedicated directories and introducing new configuration and API models.

Api/Models/LlamaModels.cs

@@ -0,0 +1,33 @@
+using System.Text.Json.Serialization;
+
+namespace Toak.Api.Models;
+
+public class LlamaRequestMessage
+{
+    [JsonPropertyName("role")]
+    public string Role { get; set; } = string.Empty;
+    [JsonPropertyName("content")]
+    public string Content { get; set; } = string.Empty;
+}
+
+public class LlamaRequest
+{
+    [JsonPropertyName("model")]
+    public string Model { get; set; } = "llama-3.1-8b-instant";
+    [JsonPropertyName("messages")]
+    public LlamaRequestMessage[] Messages { get; set; } = Array.Empty<LlamaRequestMessage>();
+    [JsonPropertyName("temperature")]
+    public double Temperature { get; set; } = 0.0;
+}
+
+public class LlamaResponse
+{
+    [JsonPropertyName("choices")]
+    public LlamaChoice[] Choices { get; set; } = Array.Empty<LlamaChoice>();
+}
+
+public class LlamaChoice
+{
+    [JsonPropertyName("message")]
+    public LlamaRequestMessage Message { get; set; } = new();
+}