加入了更为详细的Linux配置指南，修改了“针对Linux系统”文章中的错误部分

[xysgh]

PR-Codex overview

This PR focuses on enhancing the Linux configuration guide for LauncherX, adding a new section and improving existing content to assist users in setting up the application effectively on Linux systems.

Detailed summary

• Added a new item in the sidebar for the Linux配置教程 link.
• Replaced the section about Wayland with a recommendation to read the Linux配置指南.
• Introduced a new Linux中LauncherX的配置指南 document detailing installation and configuration steps.
• Provided specific commands for downloading and configuring Java.
• Included instructions for creating a .desktop file for LauncherX.
• Added tips for users with different graphics card setups.

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