docs: update main readme (#6064)

Author: quisquous

ui/raidboss/emulator/Readme.md

@@ -1,5 +1,7 @@
-# Permanently Moved to OverlayPlugin/cactbot
+# Permanently Moved
 
-See: [ui/raidboss/emulator/Readme.md](https://github.com/OverlayPlugin/cactbot/blob/main/ui/raidboss/emulator/Readme.md)
+quisquous/cactbot has permanently moved to OverlayPlugin/cactbot.
 
-<meta http-equiv="refresh" content="0; url=https://github.com/OverlayPlugin/cactbot/blob/main/ui/raidboss/emulator/Readme.md" />
+See: <https://github.com/OverlayPlugin/cactbot/>
+
+Please file any issues or pull requests there.