Add Profiling to Dispatcher

[Chrissi2812]

Summary of Changes

Added Basic Profiling for Plugins in Joomla. Just like we already have for modules and components.

One Problem is that something is happening after the afterExecutePlugin Joomla\CMS\Service\Provider\Session::session.start that takes some time that isn't profiled correctly for now. Because of that the beforeExecutePlugin right after the session.start can be a bit misleading. But at least we have a basic understanding of which plugins slow down a page.

Testing Instructions

1. Enable Debugging and Profiling
2. Load a Page and look for beforeExecutePlugin afterExecutePlugin

Documentation Changes Required

[laoneo]

This is a framework package, we shouldn't add here a dependency to the CMS classes. What happens when a project uses this package and declares the JDEBUG constant?

[HLeithner]

True sorry didn't noticed the repo when commenting the constant. I see no option to jnclude this into this package.

[laoneo]

Pretty sure there is a way to do this in the dispatcher service provider.