a good start of making the ./_benchmarks benchmarker works autonomous by installing dependencies, running them and finally save them on disk as markdown files

Former-commit-id: 685b296f62c63f98455dce36ce52989be772ba34

_benchmarks/benchmarker/installer_windows.go

@@ -0,0 +1,24 @@
+// +build windows
+
+package main
+
+func powershell(script string, args ...string) error {
+	return (&platform{"powershell"}).attach(append([]string{script}, args...)...)
+}
+
+func installDotnet(b bundle) error {
+	// Note: -Channel Preview is not available with the "latest" version, so we target a specific version;
+	// it's also required to do that because a lot of times the project .csproj settings are changing from version to version.
+	//
+	// Issue:
+	// cannot be loaded because running scripts is disabled on this system
+	// Solution with administrator privileges:
+	// Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Unrestricted
+	//
+	// Issue: ./scripts/dotnet-install.ps1 : AuthorizationManager check failed.
+	// Solution (not work):
+	// Unblock-File + script
+	// Solution (requires manual action):
+	// Right click on the ./scripts/dotnet-install.ps1 and check the "unblock" property, save and exit the dialog.
+	return powershell("./scripts/dotnet-install.ps1", b.parseArguments()...)
+}