feat(icons): added robot-arm icon (#4447)

* Added icons/robot-arm svg and json

* Update robot-arm.json

fixed metadata, removed incorrect tags, fixed categories

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

icons/robot-arm.json

@@ -0,0 +1,29 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "zoharma",
+    "karsa-mistmere"
+  ],
+  "use-cases": [
+    "Representing industrial automation and robotics",
+    "Showing automated assembly or fabrication processes",
+    "Controlling robotic equipment in manufacturing apps",
+    "Monitoring assembly line operations in factory dashboards",
+    "Indicating automated production tasks in workflow tools"
+  ],
+  "tags": [
+    "mechanical",
+    "automation",
+    "factory",
+    "manufacture",
+    "technology",
+    "cyborg",
+    "industrial",
+    "hardware",
+    "machinery"
+  ],
+  "categories": [
+    "science",
+    "tools"
+  ]
+}

icons/robot-arm.svg

@@ -0,0 +1,18 @@
+<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="M12 21 7.5 8.322" />
+  <path d="m14 7 1.75-3.767a.5.5 0 0 1 .662-.172L20 5.005" />
+  <path d="m20 8.998-3.588 1.944a.5.5 0 0 1-.662-.172L14 7H8" />
+  <path d="M3.486 21h10" />
+  <path d="M5 21V8.732" />
+  <circle cx="6" cy="7" r="2" />
+</svg>