feat: Add support for Mux SSL mode and update related settings

[HynoR]

• Introduced a new SSL mode "Mux" in the settings, allowing for HTTP to HTTPS redirection.
• Updated the SSL field in the SettingUpdate struct to include "Mux" as a valid option.
• Modified the server logic to handle Mux connections, including certificate management and HTTP redirection.
• Updated frontend components to reflect the new SSL options and improved user guidance in multiple languages.

What this PR does / why we need it?

支持 Mux 方式监听端口，允许面板启用 ssl 的情况下支持 http 流量传入，然后将 http重定向到 https

Summary of your change

引入和使用一个新的依赖cmux 来分流流量 https://github.com/soheilhy/cmux
前端适配设置
Strict 为原来的方案， Mux 为新方案

Please indicate you've done the following:

• Made sure tests are passing and test coverage is added if needed.
• Made sure commit message follow the rule of Conventional Commits specification.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed.

[f2c-ci-robot]

Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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