feat(icons): add dia (#955)

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

tree.json

@@ -377,6 +377,7 @@
         "develancacheui.png",
         "devtooly-light.png",
         "devtooly.png",
+        "dia.png",
         "diagrams-net.png",
         "dietpi.png",
         "digital-ocean.png",
@@ -2412,6 +2413,7 @@
         "denon-light.svg",
         "denon.svg",
         "deployarr.svg",
+        "dia.svg",
         "diagrams-net.svg",
         "digital-ocean.svg",
         "dillinger-light.svg",
@@ -4201,6 +4203,7 @@
         "develancacheui.webp",
         "devtooly-light.webp",
         "devtooly.webp",
+        "dia.webp",
         "diagrams-net.webp",
         "dietpi.webp",
         "digital-ocean.webp",