feat(Conversations): Added basic manager to list, delete and show con…

…versations.

Refactoring to come

src/SidekickManager.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace PapaRascalDev\Sidekick;
+
+use Illuminate\Database\Eloquent\Collection;
+use PapaRascalDev\Sidekick\Models\Conversation;
+class SidekickManager
+{
+    public function listConversations(): Collection
+    {
+        return Conversation::all();
+    }
+
+    public function showConversation(string $conversationId): array
+    {
+        $conversation =  Conversation::findOrFail($conversationId);
+
+        return [
+                'conversation_id' => $conversationId,
+                'messages' => $conversation->messages()->get(['role', 'content'])->toArray()
+            ];
+    }
+
+    public function deleteConversation(string $conversationId): void
+    {
+        $conversation = Conversation::findOrFail($conversationId);
+        $conversation->delete();
+    }
+}