feat: Made dialogs pluggable (#424)

Co-authored-by: Dennis Ploeger <develop@dieploegers.de>

addons/escoria-dialog-simple/plugin.gd

@@ -0,0 +1,92 @@
+# A simple dialog manager for Escoria
+tool
+extends EditorPlugin
+
+
+const MANAGER_CLASS="res://addons/escoria-dialog-simple/esc_dialog_simple.gd"
+
+
+# Register ourselves after setup
+func _enter_tree() -> void:
+	call_deferred("_register")
+	
+
+# Unregister ourselves
+func _exit_tree() -> void:
+	_unregister()
+
+
+# Add ourselves to the list of dialog managers
+func _register():
+	_unregister()
+	var dialog_managers: Array = ProjectSettings.get_setting(
+		"escoria/ui/dialog_managers"
+	)
+	dialog_managers.push_back(MANAGER_CLASS)
+	ProjectSettings.set_setting(
+		"escoria/ui/dialog_managers",
+		dialog_managers
+	)
+	_register_setting(
+		"escoria/dialog_simple/avatars_path",
+		"",
+		{
+			"type": TYPE_STRING,
+			"hint": PROPERTY_HINT_DIR
+		}
+	)
+	
+	_register_setting(
+		"escoria/dialog_simple/text_speed_per_character",
+		0.1,
+		{
+			"type": TYPE_REAL
+		}
+	)
+	
+	_register_setting(
+		"escoria/dialog_simple/fast_text_speed_per_character",
+		0.25,
+		{
+			"type": TYPE_REAL
+		}
+	)
+	
+	_register_setting(
+		"escoria/dialog_simple/max_time_to_disappear",
+		1.0,
+		{
+			"type": TYPE_REAL
+		}
+	)
+	
+
+# Remove ourselves from the list of dialog managers
+func _unregister():
+	var dialog_managers = ProjectSettings.get_setting(
+		"escoria/ui/dialog_managers"
+	)
+	
+	dialog_managers.erase(MANAGER_CLASS)
+	
+	ProjectSettings.set_setting(
+		"escoria/ui/dialog_managers",
+		dialog_managers
+	)
+	
+
+# Register a new project setting if it hasn't been defined already
+#
+# #### Parameters
+#
+# - name: Name of the project setting
+# - default: Default value
+# - info: Property info for the setting
+func _register_setting(name: String, default, info: Dictionary):
+	if not ProjectSettings.has_setting(name):
+		ProjectSettings.set_setting(
+			name,
+			default
+		)
+		info.name = name
+		ProjectSettings.add_property_info(info)