Add Codealike to .gitignore

+ Codealike is a Visual Studio extension for developers to track their time spent on projects.
  It may drop additional file called codealike.json at the project root.

.gitignore

@@ -206,3 +206,6 @@ project.lock.json
 docs/api/\.manifest
 
 \.idea/
+
+# Codealike UID
+codealike.json