Add a new trigger type statustrigger

StatusTrigger will trigger if a status activates (or reaches a certain
activation # of auras). This is an abstraction provided by AuraList
which keeps track of which auras belong to which statuses.

Added type annotations to all touched files

src/OmicronFrames.toc

@@ -11,6 +11,7 @@ types/types.lua
 types/object.lua
 types/triggers/trigger.lua
 types/triggers/auratrigger.lua
+types/triggers/statustrigger.lua
 types/statusbar.lua
 types/auralist.lua
 types/indicators/indicator.lua