feat(icons): add packetfence (#958)

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

tree.json

@@ -1339,6 +1339,8 @@
         "oxker-light.png",
         "oxker.png",
         "p1ib.png",
+        "packetfence-dark.png",
+        "packetfence.png",
         "pagerduty.png",
         "pairdrop.png",
         "palemoon.png",
@@ -3218,6 +3220,8 @@
         "oxker-light.svg",
         "oxker.svg",
         "p1ib.svg",
+        "packetfence-dark.svg",
+        "packetfence.svg",
         "pagerduty.svg",
         "palemoon.svg",
         "palo-alto.svg",
@@ -5165,6 +5169,8 @@
         "oxker-light.webp",
         "oxker.webp",
         "p1ib.webp",
+        "packetfence-dark.webp",
+        "packetfence.webp",
         "pagerduty.webp",
         "pairdrop.webp",
         "palemoon.webp",