Setup codegen metaprogram skeleton

Going use it to swap macro implementation usage in the compiler.

scripts/helpers/format_cpp.psm1

@@ -0,0 +1,26 @@
+# format_cpp.psm1
+
+function format-cpp
+{
+	param( $path, $include, $exclude )
+
+	# Format generated gencpp
+	Write-Host "Beginning format"
+	$formatParams = @(
+		'-i'          # In-place
+		'-style=file:.clang-format'
+		'-verbose'
+	)
+
+	$targetFiles = @(
+		Get-ChildItem -Recurse -Path $path -Include $include -Exclude $exclude
+			| Select-Object -ExpandProperty FullName
+	)
+
+	$time_taken = Measure-Command {
+		clang-format $formatParams $targetFiles
+	}
+	Write-Host "Formatting complete in $($time_taken.TotalMilliseconds) ms`n"
+}
+
+Export-ModuleMember -Function format-cpp