Event flags implementation (#382)

* Added event flags
* Added transition ESC command
* Also edited .gitignore to ignore .translation files
* docs: Automatic update of API docs

Co-authored-by: StraToN <StraToN@users.noreply.github.com>

docs/api/transition.gd.md

@@ -18,21 +18,46 @@ export var transition_name: String = ""
 
 ## Method Descriptions
 
-### fade\_out
+### transition\_out
 
 ```gdscript
-func fade_out() -> var
+func transition_out(p_transition_name: String = "") -> var
 ```
 
-Fade out the transition
+Transition out
 
-### fade\_in
+## Parameters
+
+- p_transition_name: name of the transition to play (if empty string, uses
+the default transition)
+
+### transition\_in
 
 ```gdscript
-func fade_in() -> var
+func transition_in(p_transition_name: String = "") -> var
 ```
 
-Fade in the transition
+Transition in
+
+## Parameters
+
+- p_transition_name: name of the transition to play (if empty string, uses
+the default transition)
+
+### has\_transition
+
+```gdscript
+func has_transition(p_name: String) -> bool
+```
+
+Returns true whether the transition scene has a transition corresponding
+to name provided.
+
+## Parameters
+
+- p_name: The name of the transition to test
+
+*Returns* true if a transition exists with given name.
 
 ## Signals