* Add custom profiler / tracer

This captures both client/production builds and everything before and after is cpu profiled, which makes sure that the whole process instead of just webpack is included in the final report.

* Update tests

* Update profiling-plugin.js

* Rename profiling-plugin.js to profiling-plugin.ts

* Update profiling-plugin.ts

* Update and rename profiling-plugin.ts to profiling-plugin.js

* Update webpack-config.ts

* Update profiling-plugin.js

* Add types

* Add missing type

* Add back TypeScript linting

* Remove tracing-js