Extract common extra args definition to `Extras`

StabilityMatrix/Models/LaunchOptionDefinition.cs

@@ -31,4 +31,11 @@ public class LaunchOptionDefinition
     /// List of option flags like "--api", "--lowvram", etc.
     /// </summary>
     public List<string> Options { get; set; }
+    
+    public static LaunchOptionDefinition Extras => new()
+    {
+        Name = "Extra Launch Arguments",
+        Type = LaunchOptionType.String,
+        Options = new() {""}
+    };
 }

StabilityMatrix/Models/Packages/A3WebUI.cs

@@ -54,12 +54,7 @@ public class A3WebUI : BaseGitPackage
             Name = "Xformers",
             Options = new() {"--xformers"}
         },
-        new()
-        {
-            Name = "Extra Launch Arguments",
-            Type = LaunchOptionType.String,
-            Options = new() {""}
-        }
+        LaunchOptionDefinition.Extras
     };
 
     public override async Task<string> GetLatestVersion()

StabilityMatrix/Models/Packages/DankDiffusion.cs

@@ -34,12 +34,7 @@ public class DankDiffusion : BasePackage
             Name = "Xformers",
             Options = new List<string> { "--xformers" }
         },
-        new()
-        {
-            Name = "Extra Launch Arguments",
-            Type = LaunchOptionType.String,
-            Options = new() {""}
-        }
+        LaunchOptionDefinition.Extras
     };
 
     public override Task<string> GetLatestVersion()

StabilityMatrix/Models/Packages/VladAutomatic.cs

@@ -38,12 +38,7 @@ public class VladAutomatic : BaseGitPackage
             Name = "Xformers",
             Options = new() { "--xformers" }
         },
-        new()
-        {
-            Name = "Extra Launch Arguments",
-            Type = LaunchOptionType.String,
-            Options = new() {""}
-        }
+        LaunchOptionDefinition.Extras
     };
 
     public override string ExtraLaunchArguments => "--skip-git";