close #1376: 在用户文件夹中存储账户信息 (#1941)

* Save accounts in hmcl dir

* close #1377: Add conversion button

* fix YggdrasilAccount::getIdentifier()

* Check whether the account exists before moving

* Add server url to selected account

* Add global prefix

HMCL/src/main/resources/assets/lang/I18N_zh_CN.properties

@@ -125,8 +125,11 @@ account.methods.yggdrasil.migration.hint=自 2022 年 3 月 10 日起，Mojang
 account.methods.yggdrasil.purchase=购买 Minecraft
 account.missing=没有游戏帐户
 account.missing.add=点击此处添加帐户
+account.move_to_global=转换为全局账户
+account.move_to_portable=转换为便携账户
 account.not_logged_in=未登录
 account.password=密码
+account.portable=便携账户
 account.skin=皮肤
 account.skin.file=皮肤图片文件
 account.skin.model=模型