feat(skin): WIP: download skin from CSL server.

HMCL/src/main/java/org/jackhuang/hmcl/ui/account/OfflineAccountSkinPane.java

@@ -0,0 +1,35 @@
+/*
+ * Hello Minecraft! Launcher
+ * Copyright (C) 2021  huangyuhui <huanghongxun2008@126.com> and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.jackhuang.hmcl.ui.account;
+
+import com.jfoenix.controls.JFXDialogLayout;
+import javafx.scene.layout.StackPane;
+import org.jackhuang.hmcl.auth.offline.OfflineAccount;
+import org.jackhuang.hmcl.ui.construct.MultiFileItem;
+
+public class OfflineAccountSkinPane extends StackPane {
+
+    public OfflineAccountSkinPane(OfflineAccount account) {
+
+        JFXDialogLayout layout = new JFXDialogLayout();
+        getChildren().setAll(layout);
+
+        MultiFileItem<>
+
+    }
+}