Ensure correct execution of basic commands (#939)

This ensure that dev can run `dotnet build` or `dotnet test` without problems because, for some unknown reason, if you use these comands first without running `dotnet restore` it will generate errors that are just solved with `dotnet clean`

Co-authored-by: Shargon <[email protected]>

.devcontainer/devcontainer.json

@@ -4,6 +4,7 @@
 	"name": "C# (.NET)",
 	"image": "mcr.microsoft.com/devcontainers/dotnet:1-7.0-jammy",
 	"onCreateCommand": "./scripts/load_submodule.sh",
+	"postCreateCommand": "dotnet restore && dotnet build",
 	"customizations": {
 		"vscode": {
 			"extensions": [