set line background on breakpoint

src/SharpIDE.Godot/ExampleScript.gd

@@ -1,4 +1,4 @@
-extends Node2D
+extends Control
 
 # Declare an empty dictionary object
 var game = {}
@@ -12,7 +12,7 @@ func _ready():
 		"energy": 67
 	}
 	
-	if game.empty():
+	if game.is_empty():
 		# Add data to the game dictionary
 		game["player"] = player
 		game["score"] = 0

src/SharpIDE.Godot/IdeRoot.tscn

@@ -184,6 +184,7 @@ highlight_current_line = true
 symbol_lookup_on_click = true
 symbol_tooltip_on_hover = true
 gutters_draw_breakpoints_gutter = true
+gutters_draw_executing_lines = true
 gutters_draw_line_numbers = true
 code_completion_enabled = true
 auto_brace_completion_enabled = true

src/SharpIDE.Godot/SharpIdeCodeEdit.cs

@@ -54,19 +54,20 @@ public partial class SharpIdeCodeEdit : CodeEdit
 	{
 		var lineInt = (int)line;
 		var breakpointAdded = IsLineBreakpointed(lineInt);
-		lineInt++; // Godot is 0-indexed, Debugging is 1-indexed
-		Guard.Against.Negative(lineInt, nameof(lineInt));
+		var lineForDebugger = lineInt + 1; // Godot is 0-indexed, Debugging is 1-indexed
 		var breakpoints = Singletons.RunService.Breakpoints.GetOrAdd(_currentFile, []); 
 		if (breakpointAdded)
 		{
-			breakpoints.Add(new Breakpoint { Line = lineInt } );
+			breakpoints.Add(new Breakpoint { Line = lineForDebugger } );
+			SetLineBackgroundColor(lineInt, new Color("3a2323"));
 		}
 		else
 		{
-			var breakpoint = breakpoints.Single(b => b.Line == lineInt);
+			var breakpoint = breakpoints.Single(b => b.Line == lineForDebugger);
 			breakpoints.Remove(breakpoint);
+			SetLineBackgroundColor(lineInt, Colors.Transparent);
 		}
-		GD.Print($"Breakpoint {(breakpointAdded ? "added" : "removed")} at line {lineInt}");
+		GD.Print($"Breakpoint {(breakpointAdded ? "added" : "removed")} at line {lineForDebugger}");
 	}
 
 	private void OnSymbolLookup(string symbol, long line, long column)