Spawn and delete fireballs using new keybinds

+ Follow UE4 example for spawning and destroying actors
+ https://docs.unrealengine.com/4.27/en-US/ProgrammingAndScripting/SpawnAndDestroyActors/
+ This version uses hybrid C++ and Blueprints instead of doing one or the other
+ Functions to spawn and delete fireballs exposed by UFUNCTION() prefix

.gitignore

@@ -1,3 +1,11 @@
+# Custom ignores
+**/cmake-build-debug/**
+.idea
+out
+build
+CMakeLists.txt
+
+# Default UE4 generated .ignores
 Binaries
 DerivedDataCache
 Intermediate
@@ -11,4 +19,4 @@ Saved
 *.sln
 *.suo
 *.xcodeproj
-*.xcworkspace
+*.xcworkspace