fix(icons): add omega icon (#2347)

icons/omega.json

@@ -0,0 +1,27 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "karsa-mistmere"
+  ],
+  "tags": [
+    "greek",
+    "symbol",
+    "mathematics",
+    "education",
+    "physics",
+    "engineering",
+    "ohms",
+    "electrical resistance",
+    "angular frequency",
+    "dynamical systems",
+    "astronomy",
+    "constellations",
+    "philosophy"
+  ],
+  "categories": [
+    "maths",
+    "development",
+    "text",
+    "science"
+  ]
+}

icons/omega.svg

@@ -0,0 +1,13 @@
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <path d="M3 20h4.5a.5.5 0 0 0 .5-.5v-.282a.52.52 0 0 0-.247-.437 8 8 0 1 1 8.494-.001.52.52 0 0 0-.247.438v.282a.5.5 0 0 0 .5.5H21" />
+</svg>

icons/sigma.json

@@ -15,6 +15,7 @@
   ],
   "categories": [
     "text",
-    "maths"
+    "maths",
+    "science"
   ]
 }