feat: Updated exit documentation (#545)

Co-authored-by: Dennis Ploeger <github.dennis@dieploegers.de>
Co-authored-by: Duncan Brown <duncan@prometheussoftware.ca>
Co-authored-by: Balloonpopper <balloonpopper@git.com>

addons/escoria-core/game/core-scripts/esc_exit.gd

@@ -1,4 +1,15 @@
-# An item that streamlines exiting scenes
+# An ESCExit is a minimal feature node that provides an exit to a room.
+#
+# For exits that don't require scripts, the ``ESCExit`` node is provided. 
+# The only things you will need to configure on the node are the 
+# "target_scene" to change to, and optionally, a "switch 
+# sound" (the sound to play when changing rooms).
+#
+# If you want to attach the exit to a script to perform additional actions -
+# a cutscene for example - use an ``ESCItem`` with "Is Exit" selected instead.
+#
+# The game character will automatically walk to an ``ESCLocation`` created as a
+# child of an ``ESCExit`` node.
 extends ESCItem
 class_name ESCExit, "res://addons/escoria-core/design/esc_exit.svg"
 

addons/escoria-core/game/core-scripts/esc_item.gd

@@ -1,4 +1,14 @@
-# ESCItem is a Sprite that defines an item, potentially interactive
+# An ``ESCItem`` defines a (usually interactive) item in the game.
+#
+# When interacting with an ``ESCItem``, the game character will automatically
+# walk to an ``ESCLocation`` that is created as a child of an ``ESCItem``.
+#
+# By selecting the "Is Exit" checkbox when you create an ``ESCItem``
+# node, Escoria will look for an ``:exit_scene`` event in the attached script file.
+# Any commands you place in the ``:exit_scene`` event will be run when the player
+# chooses to "use" the exit - for example, saying a goodbye, or running a
+# cutscene. Place a ``change_scene`` command inside this event to move the
+# character to the next room.
 tool
 extends Area2D
 class_name ESCItem, "res://addons/escoria-core/design/esc_item.svg"
@@ -53,7 +63,9 @@ export(String) var global_id
 # The ESC script for this item
 export(String, FILE, "*.esc") var esc_script
 
-# If true, the ESC script may have an ":exit_scene" event to manage scene changes
+# If true, the ESC script may have an ``:exit_scene`` event to manage scene changes.
+# For simple exits that do not require scripted actions, the ``ESCExit`` node may be
+# preferred.
 export(bool) var is_exit
 
 # If true, object is considered as trigger. Allows using :trigger_in and