Add activity-square icon (#1356)

* Add `activity-square` icon

* Optimise `activity` icon

* Improve `activity` metadata

icons/activity-square.json

@@ -0,0 +1,43 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "danielbayley"
+  ],
+  "tags": [
+    "pulse",
+    "action",
+    "motion",
+    "movement",
+    "exercise",
+    "fitness",
+    "healthcare",
+    "heart rate monitor",
+    "vital signs",
+    "vitals",
+    "emergency room",
+    "er",
+    "intensive care",
+    "hospital",
+    "defibrillator",
+    "earthquake",
+    "siesmic",
+    "magnitude",
+    "richter scale",
+    "aftershock",
+    "tremor",
+    "shockwave",
+    "audio",
+    "waveform",
+    "synthesizer",
+    "synthesiser",
+    "music"
+  ],
+  "categories": [
+    "medical",
+    "account",
+    "social",
+    "science",
+    "multimedia",
+    "shapes"
+  ]
+}

icons/activity-square.svg

@@ -0,0 +1,14 @@
+<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"
+>
+  <rect width="18" height="18" x="3" y="3" rx="2" />
+  <path d="M17 12h-2l-2 5-2-10-2 5H7" />
+</svg>

icons/activity.json

@@ -5,13 +5,38 @@
   ],
   "tags": [
     "pulse",
-    "health",
     "action",
-    "motion"
+    "motion",
+    "movement",
+    "exercise",
+    "fitness",
+    "healthcare",
+    "heart rate monitor",
+    "vital signs",
+    "vitals",
+    "emergency room",
+    "er",
+    "intensive care",
+    "hospital",
+    "defibrillator",
+    "earthquake",
+    "siesmic",
+    "magnitude",
+    "richter scale",
+    "aftershock",
+    "tremor",
+    "shockwave",
+    "audio",
+    "waveform",
+    "synthesizer",
+    "synthesiser",
+    "music"
   ],
   "categories": [
     "medical",
     "account",
-    "social"
+    "social",
+    "science",
+    "multimedia"
   ]
 }

icons/activity.svg

@@ -9,5 +9,5 @@
   stroke-linecap="round"
   stroke-linejoin="round"
 >
-  <polyline points="22 12 18 12 15 21 9 3 6 12 2 12" />
+  <path d="M22 12h-4l-3 9L9 3l-3 9H2" />
 </svg>