Move source code into "Source" folder

Source/LibationWinForms/Dialogs/SetupDialog.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Linq;
+using System.Windows.Forms;
+
+namespace LibationWinForms.Dialogs
+{
+	public partial class SetupDialog : Form
+	{
+		public bool IsNewUser { get; private set; }
+		public bool IsReturningUser { get; private set; }
+
+		public SetupDialog() => InitializeComponent();
+
+		private void newUserBtn_Click(object sender, EventArgs e)
+		{
+			IsNewUser = true;
+
+			this.DialogResult = DialogResult.OK;
+			Close();
+		}
+
+		private void returningUserBtn_Click(object sender, EventArgs e)
+		{
+			IsReturningUser = true;
+
+			this.DialogResult = DialogResult.OK;
+			Close();
+		}
+	}
+}