Update resource files and add new tileset; remove inactive properties and upgrade paths

resources/skills/double_jump.tres

@@ -8,15 +8,12 @@
 script = ExtResource("2_kywbf")
 Cost = 80
 Description = ""
-Properties = Dictionary[String, Variant]({})
 metadata/_custom_type_script = "uid://dwb0e05pewcsn"
 
 [resource]
 script = ExtResource("1_p5qvt")
 Name = "DOUBLE_JUMP"
 Description = "DOUBLE_JUMP_DESCRIPTION"
-IsActive = false
-Level = 1
 Type = 2
 Node = ExtResource("1_t7o84")
 Upgrades = Array[ExtResource("2_kywbf")]([SubResource("Resource_0fn2n")])