Add 4D logo (#3407)

_data/simple-icons.json

@@ -20,6 +20,11 @@
             "hex": "000000",
             "source": "https://www.42.fr/"
         },
+        {
+            "title": "4D",
+            "hex": "004088",
+            "source": "https://www.4d.com/"
+        },
         {
             "title": "500px",
             "hex": "0099E5",

icons/4d.svg

@@ -0,0 +1 @@
+<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>4D icon</title><path d="M20.64 0v24H3.36V0h17.28zM10.49 11.827c-.115.138-5.882 6.789-5.983 6.9-.058.07-.187.194-.187.36 0 .153.187.208.36.208h4.4v-1.067H5.83c.49-.61 3.38-3.824 3.696-4.226v5.34c0 .194-.005.965-.043 1.602-.029.43-.13.637-.661.693-.23.027-.533.041-.662.041-.072 0-.115.083-.115.18 0 .097.072.167.23.167.777 0 1.539-.042 1.942-.042 1.236 0 2.646.097 3.178.097 2.618 0 4.099-.97 4.746-1.607.791-.776 1.539-2.093 1.539-3.81 0-1.622-.662-2.758-1.38-3.465-1.54-1.565-3.913-1.565-5.682-1.565-.56 0-1.035.027-1.064.027-.388.042-.345-.124-.59-.138-.158-.014-.258.055-.474.305zm1.898.443c1.108 0 2.719.166 4.027 1.372.604.554 1.367 1.676 1.367 3.408 0 1.414-.288 2.66-1.194 3.409-.849.706-1.812.984-3.265.984-1.122 0-1.683-.291-1.87-.54-.115-.153-.172-.694-.186-1.04 0-.097-.015-.29-.015-.568h1.021c.245 0 .317-.055.389-.18.1-.18.244-.735.244-.86 0-.11-.057-.166-.13-.166-.086 0-.273.139-.647.139h-.877v-5.584c0-.152.058-.222.173-.277.115-.056.676-.097.963-.097z"/></svg>