set pen thickness

"General": {
    "Pen.Thickness": "4.4"
  }

src/App.axaml.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.Net.Http;
 using System.Reflection;
@@ -188,6 +189,22 @@ namespace SourceGit
                         Models.CommitGraph.SetPenColors(penColors);
                     }
 
+                    foreach (var kv in schema.General)
+                    {
+                        if (kv.Key.Equals("Pen.Thickness", StringComparison.Ordinal))
+                        {
+                            double thick = Models.CommitGraph.GetPenThickness();
+                            try
+                            {
+                                thick = double.Parse(kv.Value, CultureInfo.InvariantCulture);
+                            }
+                            catch
+                            {
+                            }
+                            Models.CommitGraph.SetPenThickness(thick);
+                        }
+                    }
+
                     app.Resources.MergedDictionaries.Add(resDic);
                     app._colorOverrides = resDic;
                 }

src/Models/CommitGraph.cs

@@ -123,6 +123,15 @@ namespace SourceGit.Models
             _penCount = colors.Count;
         }
 
+        public static void SetPenThickness(double value)
+        {
+            _penThickness = value;
+        }
+        public static double GetPenThickness()
+        {
+            return _penThickness;
+        }
+
         public static CommitGraph Parse(List<Commit> commits)
         {
             double UNIT_WIDTH = 12;
@@ -268,6 +277,7 @@ namespace SourceGit.Models
             return temp;
         }
 
+        private static double _penThickness = 1;
         private static int _penCount = 0;
         private static readonly List<Color> _defaultPenColors = [
             Colors.Orange,

src/Models/CustomColorSchema.cs

@@ -6,5 +6,6 @@ namespace SourceGit.Models
     {
         public Dictionary<string, string> Basic { get; set; } = new Dictionary<string, string>();
         public List<string> Graph { get; set; } = new List<string>();
+        public Dictionary<string,string> General { get; set; } = new Dictionary<string, string>();
     }
 }

src/Views/Histories.axaml.cs

@@ -158,6 +158,8 @@ namespace SourceGit.Views
 
                 var geo = new StreamGeometry();
                 var pen = Models.CommitGraph.Pens[line.Color];
+                pen.Thickness = Models.CommitGraph.GetPenThickness();
+
                 using (var ctx = geo.Open())
                 {
                     var started = false;