Release v0.3.0 lowercase UPM package name

PackageSource/com.foldcc.cc-framework.brisk-game-server/Documentation~/QuickStart.md

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+# 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);
+```
+
+## Archive upload
+
+```csharp
+await Brisk.Archive.UploadTextAsync(1, "{\"save\":1}");
+await Brisk.Archive.UploadJsonAsync(2, new
+{
+    save = 1,
+    coins = 128
+});
+
+var text = await Brisk.Archive.DownloadTextAsync(1);
+var json = await Brisk.Archive.DownloadJsonAsync(2);
+```
+
+Notes:
+
+- if you already have binary data, keep using `Brisk.Archive.UploadAsync(slotNo, bytes)`
+- if you need version and checksum, keep using `Brisk.Archive.DownloadAsync(slotNo)`
+- `checksum` is optional in normal use
+- the SDK computes SHA256 for you automatically
+- if you pass a manual checksum, use plain SHA256 hex
+- values like `sha256:abcd...` will be normalized by the SDK before upload
+
+## Space content
+
+```csharp
+await Brisk.Space.UpdateMyAsync("Hello Brisk Space");
+
+await Brisk.Space.UpdateMyAsync(new
+{
+    mood = "ready",
+    title = "hello"
+});
+
+var mySpace = await Brisk.Space.GetByPlayerIdAsync(Brisk.PlayerId);
+var myContent = await Brisk.Space.DownloadContentByPlayerIdAsync(Brisk.PlayerId);
+var text = Encoding.UTF8.GetString(myContent.Bytes);
+```
+
+Notes:
+
+- space metadata and space content are now separated
+- `GetByPlayerIdAsync(...)` returns metadata only
+- use `DownloadContentByPlayerIdAsync(...)` to read the actual content bytes
+- `UpdateMyAsync(...)` automatically picks text / binary / json behavior from the payload type
+
+## 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