feature: Initialize account password on first access

[liuqiufeng]

Why you need it?

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目前seata的账号密码是在server中配置，且提供了默认值。在大部分情况下，用户可能不会调整该值，有一定安全风险。
希望提供在首次访问时，强制初始化账号密码的功能，确保用户不会使用默认账号密码。
初始化的账号密码，按照用户配置的存储方式存储。

Currently the account password for seata is configured in the server and a default value is provided. In most cases, users may not adjust this value, which is a security risk. We would like to provide a function to force the initialization of the account password when accessing for the first time, to ensure that the user will not use the default account password. The initialized account password is stored according to the storage method configured by the user.

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