Update bookmarks and site history data

Replaced Google and GitHub bookmarks with a Portfolio entry in bookmarks.json and added a backup file. Updated YouTube icon and modified site-history.json to include new entries and reorder existing ones.

bookmarks.backup.json

@@ -0,0 +1,7 @@
+[
+  {
+    "title": "Portfolio",
+    "url": "https://www.andrewzambazos.com",
+    "icon": "videogame_asset"
+  }
+]

bookmarks.json

@@ -1,17 +1,12 @@
 [
   {
-    "title": "Google",
-    "url": "https://www.google.com",
-    "icon": "search"
-  },
-  {
-    "title": "GitHub",
-    "url": "https://github.com",
-    "icon": "code"
+    "title": "Portfolio",
+    "url": "https://www.andrewzambazos.com",
+    "icon": "videogame_asset"
   },
   {
     "title": "YouTube",
     "url": "https://www.youtube.com",
-    "icon": "play_arrow"
+    "icon": "play_circle"
   }
 ]

site-history.json

@@ -1,9 +1,11 @@
 [
+  "https://www.youtube.com/",
+  "https://www.andrewzambazos.com/",
+  "file:///X:/Projects/Code/NebulaBrowser/renderer/index.html",
   "https://duckduckgo.com/?q=dogs&ia=web",
   "https://duckduckgo.com/?q=dogs",
   "https://www.bing.com/search?q=dogs",
   "https://www.google.com/search?q=cats",
-  "https://www.youtube.com/",
   "https://github.com/",
   "file:///X:/Projects/Code/NebulaBrowser/renderer/index.html",
   "file:///X:/Projects/Code/NebulaBrowser/renderer/index.html",