Add boombox icon (#1249)

* Add `boombox` icon

* Rename/refine `boom-box` icon

* Refine `boom-box` icon

icons/boom-box.json

@@ -0,0 +1,18 @@
+{
+  "$schema": "../icon.schema.json",
+  "tags": [
+    "radio",
+    "speakers",
+    "audio",
+    "music",
+    "sound",
+    "broadcast",
+    "live",
+    "frequency"
+  ],
+  "categories": [
+    "devices",
+    "multimedia",
+    "social"
+  ]
+}

icons/boom-box.svg

@@ -0,0 +1,19 @@
+<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="M4 9V5a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v4" />
+  <path d="M8 8v1" />
+  <path d="M12 8v1" />
+  <path d="M16 8v1" />
+  <rect width="20" height="12" x="2" y="9" rx="2" />
+  <circle cx="8" cy="15" r="2" />
+  <circle cx="16" cy="15" r="2" />
+</svg>