fix: 实体列表、列表下拉详情、实体关系添加国旗

public/images/flag/Unknown.svg

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="18px" height="12px" viewBox="0 0 18 12" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>未知</title>
+    <g id="🥇Entity" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="Entity_Explore【domain展开】" transform="translate(-180.000000, -216.000000)">
+            <g id="未知" transform="translate(180.000000, 216.000000)">
+                <rect id="矩形" fill="#EFF2F5" x="0" y="0" width="18" height="12"></rect>
+                <g transform="translate(2.000000, 3.000000)" fill="#96A2B0" fill-rule="nonzero">
+                    <polygon id="路径" points="1.513 2.957 1.035 2 0.991 2 1.13 2.957 1.13 6.131 0 6.131 0 0 0.869 0 3.174 3.243 3.635 4.174 3.679 4.174 3.539 3.243 3.539 0.043 4.67 0.043 4.67 6.174 3.8 6.174"></polygon>
+                    <path d="M12.261,4.783 L10.391,4.783 L9.93,6.131 L8.739,6.131 L10.93,0 L11.808,0 L14,6.131 L12.748,6.131 L12.261,4.783 Z M10.696,3.827 L12,3.827 L11.548,2.47 L11.365,1.513 L11.321,1.513 L11.138,2.478 L10.696,3.827 Z" id="形状"></path>
+                    <polygon id="路径" points="8.101 0 5.367 6.174 6.396 6.174 9.123 0"></polygon>
+                </g>
+            </g>
+        </g>
+    </g>
+</svg>