feat: complete TASK-WP0-01 toolchain skeleton

supervisor/Dada.Supervisor/Dada.Supervisor.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <UseWindowsForms>true</UseWindowsForms>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+</Project>

supervisor/Dada.Supervisor/Program.cs

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+namespace Dada.Supervisor;
+
+internal static class Program
+{
+    [STAThread]
+    private static void Main()
+    {
+        ApplicationConfiguration.Initialize();
+        Application.Run(new SupervisorForm());
+    }
+}

supervisor/Dada.Supervisor/SupervisorForm.cs

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+namespace Dada.Supervisor;
+
+internal sealed class SupervisorForm : Form
+{
+    public SupervisorForm()
+    {
+        ClientSize = new Size(420, 160);
+        FormBorderStyle = FormBorderStyle.FixedDialog;
+        MaximizeBox = false;
+        StartPosition = FormStartPosition.CenterScreen;
+        Text = "Dada";
+    }
+}