Add show_menu and hide_menu ESC commands

Fixes godot-escoria/escoria-issues#48
Fix: tween was stopped_all before starting


Fix: reload locale from settings in ESCGame

Since main menu and pause menu are now loaded from ESCGame and not from escoria.gd, this must be done here.
Fix: small crash in load game

But save and load are broken at the moment...
Fix: check save and load after main menu changes


Required fixes


Fix: manage the game scene better in show and hide_menu


Enh: transition back in to the previous room if there was one


Fix a bug occurring where change_scene awaits forever for setup to end


Reworked change_scene and esc_room implementation to avoid yielding


Added a controller variable to allow new event run in events_manager


Don't empty the events queue if the running_event was interrupted


Fixed transitions and automatic transitions in change_scene

Added trace log level (for esc_compiler in particular)
Fixed various bugs in ESC scripts
Fix a bug where exit_scene happened multiple times where fast walking

Needed to clear the event queue
Fixes ready event was run because BYPASS_LAST_SCENE wrongly set


Inverted parameter "disable_automatic_transitions"

for change_scene, hide_menu, show_menu commands
Fix broken sched_event


Fixes as requested in PR

game/rooms/room14/esc/button_main_menu_change_scene.esc

@@ -0,0 +1,37 @@
+
+:use
+
+# This event demonstrates the following:
+#- fade out to black
+#- show the main menu (automatic transition disabled to manage those manually)
+#- wait 2 seconds
+#- change scene (automatic transition disabled to managed those manually) to reload this same room
+
+
+# Fade out to black
+transition fade_black out
+wait 2
+
+# Show main menu, automatic transition DISABLED
+show_menu pause
+
+# Showing menu
+transition shards in
+
+# Wait 2 seconds on menu
+wait 2
+
+# Transition out before hiding menu
+transition fade_black out
+
+# Hide the menu
+hide_menu pause
+wait 1
+
+# Do NOT transition IN as this transition will be managed by the room's :setup event!
+# If you transition IN here instead of room's :setup event, you will show the previous room
+
+# Change scene to same scene, disabled automatic transition
+change_scene res://game/rooms/room14/room14.tscn true
+
+# Do not transition here either, as change_scene ends the execution of this script