add brimhaven-agility (#8889)

* Adds the brimhaven-agility plugin

* Addresses feedback from RuneLite plugin hub PR

* ensures license header is present on all files from Quest Helper
* simplifies config
* wrap build.gradle lines at 120 chars

* Addresses code review feedback, fixes a bug in subPath, adds GH action

* ensures an infinite loop cannot occur in pathfinding
* ensures recomputing path runs on client thread
* fixes a bug in subPath which was causing incorrect paths for a tick
* adds Github action to ensure plugin builds correctly

* Adds an extra safety check to reconstructPath

plugins/brimhaven-agility

@@ -0,0 +1,2 @@
+repository=https://github.com/kagof/rl-plugin-brimhaven-agility.git
+commit=7df024e389b0f2780b01b2becbbb1614e9252977