new icon fetching service. remove besticon dep.

src/Icons/Models/IconResult.cs

@@ -0,0 +1,70 @@
+using System;
+using HtmlAgilityPack;
+
+namespace Bit.Icons.Models
+{
+    public class IconResult
+    {
+        public IconResult(string href, HtmlNode node)
+        {
+            Path = href;
+            var sizesAttr = node.Attributes["sizes"];
+            if(!string.IsNullOrWhiteSpace(sizesAttr?.Value))
+            {
+                var sizeParts = sizesAttr.Value.Split('x');
+                if(sizeParts.Length == 2 && int.TryParse(sizeParts[0].Trim(), out var width) &&
+                    int.TryParse(sizeParts[1].Trim(), out var height))
+                {
+                    DefinedWidth = width;
+                    DefinedHeight = height;
+
+                    if(width == height)
+                    {
+                        if(width == 32)
+                        {
+                            Priority = 1;
+                        }
+                        else if(width == 64)
+                        {
+                            Priority = 2;
+                        }
+                        else if(width >= 24 && width <= 128)
+                        {
+                            Priority = 3;
+                        }
+                        else if(width == 16)
+                        {
+                            Priority = 4;
+                        }
+                        else
+                        {
+                            Priority = 100;
+                        }
+                    }
+                }
+            }
+
+            if(Priority == 0)
+            {
+                Priority = 200;
+            }
+        }
+
+        public IconResult(Uri uri, byte[] bytes, string format)
+        {
+            Path = uri.ToString();
+            Icon = new Icon
+            {
+                Image = bytes,
+                Format = format
+            };
+            Priority = 10;
+        }
+
+        public string Path { get; set; }
+        public int? DefinedWidth { get; set; }
+        public int? DefinedHeight { get; set; }
+        public Icon Icon { get; set; }
+        public int Priority { get; set; }
+    }
+}