Detects inconsistent indentation character usage in leading whitespace, specifically flagging tabs where spaces are configured, and spaces where tabs are configured.

Godot doesn't allow mixing tabs and spaces in the indents.

For example, if your code style is configured to use spaces for indentation:

func _init():
  var x = 1
\tvar y = 2 # Highlighted: Tab found where spaces are preferred

Or, if your code style is configured to use tabs for indentation:

func _init():
\tvar x = 1
    var y = 2 # Highlighted: Space found where tabs are preferred