add new thermometer icons (#259)

icons/thermometer-snowflake.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="M2 12h10" />
+  <path d="M9 4v16" />
+  <path d="M3 9l3 3-3 3" />
+  <path d="M12 6L9 9 6 6" />
+  <path d="M6 18l3-3 1.5 1.5" />
+  <path d="M18 2a2 2 0 00-2 2v10.5a4 4 0 104 0V4a2 2 0 00-2-2z" />
+</svg>

icons/thermometer-sun.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 9a4 4 0 00-2 7.5" />
+  <path d="M12 3v2" />
+  <path d="M6.6 18.4l-1.4 1.4" />
+  <path d="M18 2a2 2 0 012 2v10.5a4 4 0 11-4 0V4c0-1.1.9-2 2-2z" />
+  <path d="M4 13H2" />
+  <path d="M6.6 7.6L5.2 6.2" />
+</svg>

icons/thermometer.svg

@@ -9,5 +9,5 @@
   stroke-linecap="round"
   stroke-linejoin="round"
 >
-  <path d="M14 14.76V3.5a2.5 2.5 0 00-5 0v11.26a4.5 4.5 0 105 0z" />
+  <path d="M12 2a2 2 0 00-2 2v10.5a4 4 0 104 0V4a2 2 0 00-2-2z" />
 </svg>