Add atomic icon (#991)

Update icons/atom.svg


Update icons/atom.json

Co-authored-by: Karsa <contact@karsa.org>

icons/atom.json

@@ -0,0 +1,14 @@
+{
+  "$schema": "../icon.schema.json",
+  "tags": [
+    "atomic",
+    "nuclear",
+    "physics",
+    "particle",
+    "element",
+    "molecule"
+  ],
+  "categories": [
+    "science"
+  ]
+}

icons/atom.svg

@@ -0,0 +1,15 @@
+<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"
+>
+  <circle cx="12" cy="12" r="1" />
+  <path d="M20.2 20.2c2.04-2.03.02-7.36-4.5-11.9-4.54-4.52-9.87-6.54-11.9-4.5-2.04 2.03-.02 7.36 4.5 11.9 4.54 4.52 9.87 6.54 11.9 4.5Z" />
+  <path d="M15.7 15.7c4.52-4.54 6.54-9.87 4.5-11.9-2.03-2.04-7.36-.02-11.9 4.5-4.52 4.54-6.54 9.87-4.5 11.9 2.03 2.04 7.36.02 11.9-4.5Z" />
+</svg>