Add beta release capability

Builders/LinuxBuilder.cs

@@ -20,10 +20,15 @@ public LinuxBuilder(string version)
         {
             stagingTarget = Path.Combine(Program.StagingPath, app_dir);
             publishTarget = Path.Combine(stagingTarget, "usr", "bin");
+
+            RuntimeIdentifier = $"{os_name}-x64";
+
+            if (Program.PhotonRelease)
+                RuntimeIdentifier += "-photon";
         }
 
         protected override string TargetFramework => "net8.0";
-        protected override string RuntimeIdentifier => $"{os_name}-x64";
+        protected override string RuntimeIdentifier { get; }
 
         public override Uploader CreateUploader()
         {

Builders/MacOSBuilder.cs

@@ -30,6 +30,9 @@ public MacOSBuilder(string version, string? arch)
 
             RuntimeIdentifier = $"{os_name}-{arch}";
 
+            if (Program.PhotonRelease)
+                RuntimeIdentifier += "-photon";
+
             stagingTarget = Path.Combine(Program.StagingPath, app_dir);
             publishTarget = Path.Combine(stagingTarget, "Contents", "MacOS");
         }

Builders/WindowsBuilder.cs

@@ -12,7 +12,7 @@ public class WindowsBuilder : Builder
     {
         private const string app_name = "osu!.exe";
         private const string os_name = "win";
-        private const string channel = "win";
+        private readonly string channel = Program.PhotonRelease ? "win-photon" : "win";
 
         public WindowsBuilder(string version)
             : base(version)

Program.cs

@@ -45,6 +45,7 @@ internal static class Program
         public static string? AppleKeyChainPath => ConfigurationManager.AppSettings["AppleKeyChainPath"];
 
         public static bool IncrementVersion => bool.Parse(ConfigurationManager.AppSettings["IncrementVersion"] ?? "true");
+        public static bool PhotonRelease => bool.Parse(ConfigurationManager.AppSettings["PhotonRelease"] ?? "false");
 
         public static string SolutionPath { get; private set; } = null!;
 
@@ -97,6 +98,9 @@ public static void Main(string[] args)
             if (args.Length > 2 && !string.IsNullOrEmpty(args[2]))
                 Enum.TryParse(args[2], true, out targetPlatform);
 
+            if (PhotonRelease)
+                version += "-photon";
+
             Console.ResetColor();
             Console.WriteLine($"Increment Version:     {IncrementVersion}");
             Console.WriteLine($"Signing Certificate:   {WindowsCodeSigningMetadataPath}");