add metrics-tracker (#7937)

* Create data-logger

* Update and rename data-logger to metrics-tracker

* Fixed formatting and tweaked the cases that are considered an npc death

* Fixed reset others feature on npc kill trackers

* Refactoring to clean up things further

* Added shutdown method to remove panel button and reset metrics

plugins/metrics-tracker

@@ -0,0 +1,2 @@
+repository=https://github.com/touchtouch105/metricstracker.git
+commit=eda4aa9fb738bc80542af68bdb77948a498a9ffe