feat: add Cake build to produce powershell module (#2)

- Add Cake build project
- Change to CPM
- Package bumps for security bumps
- Reorganise solution structure to group harness projects

build/Tasks/BuildTask.cs

@@ -0,0 +1,36 @@
+using Cake.Common.Tools.DotNet;
+using Cake.Common.Tools.DotNet.Build;
+using Cake.Common.Tools.DotNet.MSBuild;
+using Cake.Core.Diagnostics;
+using Cake.Frosting;
+
+namespace Build.Tasks;
+
+[TaskName("Build")]
+[IsDependentOn(typeof(CleanTask))]
+[IsDependeeOf(typeof(CopyOutputTask))]
+public class BuildTask : FrostingTask<BuildContext>
+{
+	public override void Run(BuildContext context)
+	{
+		context.Log.Information($"Building: {context.PowershellModuleCsproj}");
+
+		var buildSettings = new DotNetBuildSettings()
+		{
+			MSBuildSettings = new DotNetMSBuildSettings()
+			{
+				VersionSuffix = "cake"
+			},
+			OutputDirectory = context.PowershellModuleOutputDir,
+			DiagnosticOutput = true
+		};
+
+		// /p:DebugSymbols=false
+		buildSettings.MSBuildSettings.Properties.Add("DebugSymbols", ["false"]);
+		// /p:DebugType=None
+		buildSettings.MSBuildSettings.Properties.Add("DebugType", ["None"]);
+
+		context.DotNetBuild(context.PowershellModuleCsproj, buildSettings);
+		base.Run(context);
+	}
+}