feat: Add "server-room.md" Page to the Operations Basics Section

[ywh555hhh]

Description:
I have created a new page named server-room.md for the Operations Basics section, which aims to introduce basic information about small-scale data centers. This page is intended to provide Linux201 project users with essential foundational knowledge about data centers. The main content includes:

• UPS (Uninterruptible Power Supply): Ensures data safety during power outages.
• Switches: Core components for network communication.
• Physical Servers: The main computing units in a data center.
• Others: Additional relevant data center equipment and concepts will also be covered.

Discussion Points:
Can we clarify the focus of the existing server.md section? Should it cover detailed types of physical servers, like blade, tower, and rack servers? We need to discuss how server.md and server-room.md should relate to each other to ensure consistent and logical content organization.