Added comments and slightly refactored code for deletion of temp node

src/common/constants.zig

@@ -25,6 +25,9 @@ pub const ROAD_COLOUR = clr.black;
 /// Colour of the road that is highlighted
 pub const ROAD_HIGHLIGHTED_COLOUR = clr.green;
 
+/// Regular text size
 pub const TEXT_SIZE = 50;
+/// Text size that is used for displaying entity IDs
 pub const ENTITY_DATA_TEXT_SIZE = TEXT_SIZE / 2;
+/// Text colour in which entity IDs are displayed if toggled
 pub const ENTITY_DATA_TEXT_COLOUR = clr.orange;