Add/refine radio[-tower] icons (#1070)

* Add `radio-tower` icon

* Refine `radio` icon
Update icons/radio-tower.svg

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

* Apply suggestions from code review

---------

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

icons/radio-tower.json

@@ -0,0 +1,15 @@
+{
+  "$schema": "../icon.schema.json",
+  "tags": [
+    "signal",
+    "broadcast",
+    "connectivity",
+    "live",
+    "frequency"
+  ],
+  "categories": [
+    "devices",
+    "multimedia",
+    "social"
+  ]
+}

icons/radio-tower.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="M4.9 16.1C1 12.2 1 5.8 4.9 1.9" />
+  <path d="M7.8 4.7a6.14 6.14 0 0 0-.8 7.5" />
+  <circle cx="12" cy="9" r="2" />
+  <path d="M16.2 4.8c2 2 2.26 5.11.8 7.47" />
+  <path d="M19.1 1.9a9.96 9.96 0 0 1 0 14.1" />
+  <path d="M9.5 18h5" />
+  <path d="m8 22 4-11 4 11" />
+</svg>

icons/radio.json

@@ -4,7 +4,8 @@
     "signal",
     "broadcast",
     "connectivity",
-    "live"
+    "live",
+    "frequency"
   ],
   "categories": [
     "devices",

icons/radio.svg

@@ -9,9 +9,9 @@
   stroke-linecap="round"
   stroke-linejoin="round"
 >
+  <path d="M4.9 19.1C1 15.2 1 8.8 4.9 4.9" />
+  <path d="M7.8 16.2c-2.3-2.3-2.3-6.1 0-8.5" />
   <circle cx="12" cy="12" r="2" />
-  <path d="M4.93 19.07a10 10 0 0 1 0-14.14" />
-  <path d="M7.76 16.24a6 6 0 0 1-1.3-1.95 6 6 0 0 1 0-4.59 6 6 0 0 1 1.3-1.95" />
-  <path d="M16.24 7.76a6 6 0 0 1 1.3 2 6 6 0 0 1 0 4.59 6 6 0 0 1-1.3 1.95" />
-  <path d="M19.07 4.93a10 10 0 0 1 0 14.14" />
+  <path d="M16.2 7.8c2.3 2.3 2.3 6.1 0 8.5" />
+  <path d="M19.1 4.9C23 8.8 23 15.1 19.1 19" />
 </svg>