feat(icons): added monitor-activity icon (#5090)

* Added icons/monitor-activity.svg

* Added icons/monitor-activity.json

* Update icons/monitor-activity.json

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Update icons/monitor-activity.json

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Update icons/monitor-activity.json

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Add activity tag to monitor-activity.json

* Update metadata

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Eric Fennis <eric.fennis@gmail.com>

icons/monitor-activity.json

@@ -0,0 +1,42 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "colebemis",
+    "ericfennis",
+    "danielbayley",
+    "jguddas",
+    "karsa-mistmere"
+  ],
+  "use-cases": [
+    "Monitoring computer performance in system diagnostics tools",
+    "Showing application health in service monitoring dashboards",
+    "Displaying network activity in administration panels",
+    "Representing patient vital signs in clinical monitoring interfaces",
+    "Tracking server uptime and resource usage in infrastructure dashboards",
+    "Displaying hardware sensor readings in device management interfaces"
+  ],
+  "tags": [
+    "$extends:monitor",
+    "$extends:activity",
+    "heartbeat",
+    "health",
+    "performance",
+    "diagnostics",
+    "metrics",
+    "telemetry",
+    "network",
+    "observability",
+    "uptime",
+    "server",
+    "infrastructure",
+    "resource usage",
+    "system status",
+    "real-time",
+    "monitoring",
+    "dashboard"
+  ],
+  "categories": [
+    "connectivity",
+    "devices"
+  ]
+}

icons/monitor-activity.svg

@@ -0,0 +1,16 @@
+<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 17v4" />
+  <path d="M18 10h-2.315a1 1 0 00-.932.64l-.787 2.034a.5.5 0 01-.932 0l-2.068-5.348a.5.5 0 00-.932 0l-.787 2.035a1 1 0 01-.932.639H6" />
+  <path d="M8 21h8" />
+  <rect x="2" y="3" width="20" height="14" rx="2" />
+</svg>