add GrowiLogo component

src/client/js/components/GrowiLogo.jsx

@@ -0,0 +1,34 @@
+import React from 'react';
+
+const GrowiLogo = () => (
+  <svg
+    xmlns="http://www.w3.org/2000/svg"
+    width="32"
+    height="32"
+    viewBox="0 0 226.44 196.11"
+  >
+    <path
+      d="M56.61 196.11L169.83 196.11 226.44 98.06 188.7 98.06 150.96 163.43 75.48 163.43 56.61 196.11z"
+      className="group2"
+    >
+    </path>
+    <path
+      // eslint-disable-next-line max-len
+      d="M75.48 98.05L94.35 65.37 150.96 65.38 207.57 65.37 207.57 65.38 226.44 98.06 169.83 98.06 113.22 98.06 94.39 130.66 94.3 130.66 84.92 114.4 75.48 98.05z"
+      className="group1"
+    >
+    </path>
+    <path
+      d="M0 98.06L56.6 0 113.22 0.01 169.83 0.01 169.83 0.01 188.69 32.68 132.09 32.69 75.47 32.69 18.86 130.74 0 98.06z"
+      className="group1"
+    >
+    </path>
+    <path
+      d="M75.48 163.43L56.61 130.74 37.71 163.46 47.15 179.81 56.54 196.07 56.63 196.07 75.48 163.43z"
+      className="group1"
+    >
+    </path>
+  </svg>
+);
+
+export default GrowiLogo;