Include VS code workspace file

This workspace sets things up so that source code navigation works
propertly in VS code.

.gitignore

@@ -1,3 +1,2 @@
 .git
 .vscode
-actions.code-workspace

actions.code-workspace

@@ -0,0 +1,11 @@
+{
+	"folders": [
+		{
+			"path": "."
+		},
+		{
+			"path": "sources"
+		}
+	],
+	"settings": {}
+}