feat(icons): add double-commander (#1071)

Co-authored-by: Dashboard Icons Manager <193821040+dashboard-icons-manager[bot]@users.noreply.github.com>

tree.json

@@ -434,6 +434,7 @@
         "domoticz.png",
         "donetick.png",
         "dopplertask.png",
+        "double-commander.png",
         "double-take-dark.png",
         "double-take.png",
         "dovecot.png",
@@ -2496,6 +2497,7 @@
         "dokemon.svg",
         "dokuwiki.svg",
         "donetick.svg",
+        "double-commander.svg",
         "double-take-dark.svg",
         "double-take.svg",
         "dovecot.svg",
@@ -4344,6 +4346,7 @@
         "domoticz.webp",
         "donetick.webp",
         "dopplertask.webp",
+        "double-commander.webp",
         "double-take-dark.webp",
         "double-take.webp",
         "dovecot.webp",