Fix research xp generation

docs/gyms/tiny_sword/buildings/monastery/monastery.gd

@@ -0,0 +1,14 @@
+extends Node2D
+
+@onready var _research_panel: ResearchPanel = $ResearchPanel
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	_research_panel.visible = false
+
+func _on_area_2d_mouse_entered() -> void:
+	_research_panel.visible = true
+
+
+func _on_area_2d_mouse_exited() -> void:
+	_research_panel.visible = false