Delete Kniffel.apk and simplify GameScene node definitions

Removed the Kniffel.apk binary file and its reference in .gitignore. Simplified multiple node definitions in GameScene.tscn by eliminating unnecessary properties like item_count and popup details.

.gitignore

@@ -2,3 +2,7 @@
 .godot/
 
 .idea/
+
+Kniffel.apk
+
+Kniffel.apk.idsig

GameScene.tscn

@@ -436,10 +436,7 @@ layout_mode = 2
 theme_override_font_sizes/font_size = 50
 alignment = 1
 clip_text = true
-item_count = 1
 allow_reselect = true
-popup/item_0/text = "-"
-popup/item_0/id = 0
 
 [node name="Four_of_a_Kind" type="Panel" parent="ScrollContainer/VBoxContainer"]
 custom_minimum_size = Vector2(1080, 150)
@@ -473,10 +470,7 @@ layout_mode = 2
 theme_override_font_sizes/font_size = 50
 alignment = 1
 clip_text = true
-item_count = 1
 allow_reselect = true
-popup/item_0/text = "-"
-popup/item_0/id = 0
 
 [node name="Full_House" type="Panel" parent="ScrollContainer/VBoxContainer"]
 custom_minimum_size = Vector2(1080, 150)
@@ -510,10 +504,7 @@ layout_mode = 2
 theme_override_font_sizes/font_size = 50
 alignment = 1
 clip_text = true
-item_count = 1
 allow_reselect = true
-popup/item_0/text = "-"
-popup/item_0/id = 0
 
 [node name="Small_Straight" type="Panel" parent="ScrollContainer/VBoxContainer"]
 custom_minimum_size = Vector2(1080, 150)
@@ -547,10 +538,7 @@ layout_mode = 2
 theme_override_font_sizes/font_size = 50
 alignment = 1
 clip_text = true
-item_count = 1
 allow_reselect = true
-popup/item_0/text = "-"
-popup/item_0/id = 0
 
 [node name="Large_Straight" type="Panel" parent="ScrollContainer/VBoxContainer"]
 custom_minimum_size = Vector2(1080, 150)
@@ -584,10 +572,7 @@ layout_mode = 2
 theme_override_font_sizes/font_size = 50
 alignment = 1
 clip_text = true
-item_count = 1
 allow_reselect = true
-popup/item_0/text = "-"
-popup/item_0/id = 0
 
 [node name="yahtzee" type="Panel" parent="ScrollContainer/VBoxContainer"]
 custom_minimum_size = Vector2(1080, 150)
@@ -661,10 +646,7 @@ layout_mode = 2
 theme_override_font_sizes/font_size = 50
 alignment = 1
 clip_text = true
-item_count = 1
 allow_reselect = true
-popup/item_0/text = "-"
-popup/item_0/id = 0
 
 [node name="Score" type="Panel" parent="ScrollContainer/VBoxContainer"]
 custom_minimum_size = Vector2(0, 150)