Implemented group highlight on hover

It's not currently stable, but it's ok for now.

token.gd

@@ -2,6 +2,7 @@ extends Node2D
 class_name Token
 
 signal token_clicked
+signal token_hovered(entered: bool)
 
 enum token_type {TYPE_1, TYPE_2, TYPE_3, TYPE_4}
 enum token_state {NONE, HIGHLIGHT}
@@ -17,7 +18,7 @@ func _ready():
 	color_polygon = $Color
 	highlight_polygon = $highlight_indicator
 	debug_label = $"Debug Label"
-			
+
 func set_type(type: token_type):
 	self.type = type
 	match self.type:
@@ -29,7 +30,7 @@ func set_type(type: token_type):
 			color_polygon.color = Color.BLUE
 		token_type.TYPE_4:
 			color_polygon.color = Color.GOLD
-			
+
 func set_debug_label(text: String):
 	debug_label.text = text
 
@@ -38,6 +39,18 @@ func _on_area_2d_input_event(viewport: Node, event: InputEvent, shape_idx: int)
 #	emit event up to parent on click
 	if Input.is_action_just_pressed("select"):
 		token_clicked.emit()
-		
+
 func set_highlighted(highlight: bool):
 	state = token_state.HIGHLIGHT if highlight else token_state.NONE
+	match state:
+		token_state.HIGHLIGHT:
+			highlight_polygon.visible = true
+		token_state.NONE:
+			highlight_polygon.visible = false
+
+
+func _on_area_2d_mouse_entered() -> void:
+	token_hovered.emit(true)
+
+func _on_area_2d_mouse_exited() -> void:
+	token_hovered.emit(false)