Initial Brisk Unity SDK project

PackageSource/com.foldcc.cc-framework.BriskGameServer/Documentation~/QuickStart.md

@@ -0,0 +1,43 @@
+# Quick Start
+
+## Initialize
+
+```csharp
+await Brisk.InitializeAsync(new BriskOptions
+{
+    BaseUrl = "https://brisk.lightyears.ltd",
+    GameKey = "demo-game",
+    ClientVersion = Application.version,
+    DeviceId = SystemInfo.deviceUniqueIdentifier
+});
+```
+
+## Login
+
+```csharp
+await Brisk.Auth.LoginWithUserIdAsync("tap", "tap_user_10001");
+```
+
+## Common calls
+
+```csharp
+var me = await Brisk.Player.GetMeAsync();
+var config = await Brisk.Config.GetCurrentAsync();
+var top = await Brisk.Leaderboard.GetTopAsync("season-score", 20);
+await Brisk.Leaderboard.SubmitScoreAsync("season-score", 128);
+```
+
+## Sample
+
+For the current source project, open directly:
+
+- `Assets/BriskSdk/Samples/QuickStart/BriskQuickStartSample.cs`
+- `Assets/Scenes/BriskQuickStartScene.unity`
+
+The sample scene uses an IMGUI debug panel and can directly test:
+
+- initialize and restore
+- login by `login_user_id`
+- login by `code`
+- player, config, announcement, leaderboard, archive, and space flows
+- global event logs and request results