Add playground launch profile

Author: angularsen

.devcontainer/unitsnet-modular/devcontainer.json

@@ -9,6 +9,7 @@
       ],
       "settings": {
         "dotnet.defaultSolution": "UnitsNet.Modular/Samples/UnitsNet.Modular.Playground/UnitsNet.Modular.Playground.csproj",
+        "csharp.debug.console": "integratedTerminal",
         "terminal.integrated.cwd": "${workspaceFolder}/UnitsNet.Modular/Samples/UnitsNet.Modular.Playground"
       }
     },
@@ -18,6 +19,7 @@
         "UnitsNet.Modular/Samples/UnitsNet.Modular.Playground/ApplicationUnits.cs",
         "UnitsNet.Modular/Samples/UnitsNet.Modular.Playground/GameScore.unitsnet.json",
         "UnitsNet.Modular/Samples/UnitsNet.Modular.Playground/Program.cs",
+        "UnitsNet.Modular/Samples/UnitsNet.Modular.Playground/Properties/launchSettings.json",
         "UnitsNet.Modular/Samples/UnitsNet.Modular.Playground/UnitsNet.Modular.Playground.csproj"
       ]
     }

UnitsNet.Modular/Samples/UnitsNet.Modular.Playground/Properties/launchSettings.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "profiles": {
+    "UnitsNet.Modular playground": {
+      "commandName": "Project"
+    }
+  }
+}

UnitsNet.Modular/Samples/UnitsNet.Modular.Playground/README.md

@@ -4,9 +4,13 @@ This small console app runs the real UnitsNet.Modular source generator from the
 checkout. The generated quantity structs and unit enums become part of this app at build time; no
 generated C# is checked in.
 
-## Run it
+## Run it from VS Code
 
-The Codespace builds the project once while it is being created. Open a terminal and run:
+The Codespace builds the project once while it is being created. Open `Program.cs`, then press `F5`
+to debug or `Ctrl+F5` to run without the debugger. If VS Code asks for a profile, choose
+**UnitsNet.Modular playground**. Output appears in the integrated terminal.
+
+You can also open a terminal and run:
 
 ```shell
 dotnet run