rename blackbox

[cooper-lzy]

What type of PR is this?

• bug
• feature
• enhancement

What problem(s) does this PR solve?

Issue(s) number:

Description:

How do you solve it?

Special notes for your reviewer, ex. impact of this fix, design document, etc:

[whitewum]

The commit message and the code changes are consistent with each other.
The code changes rename "blackbox" to "{{bbox.name}}" throughout the codebase.
The change updates the documentation files 3.1.bbox.md and 3.2.bbox-reviewer.md in the 6.monitor-and-metrics/3.bbox directory.
In 3.1.bbox.md:
The title is updated from {{bbox.name}}介绍 to 黑匣子介绍.
The introductory paragraph is modified to mention that {{nebula.name}} comes with the black box functionality.
The section title "功能说明" remains unchanged.
The section title "查看和分析黑匣子文件" is updated to "查看黑匣子文件."
The paragraph mentioning "NebulaGraph Black Box 工具" is updated to mention {{bbox.name}} instead.
In 3.2.bbox-reviewer.md:
The title is updated from "黑匣子工具 NebulaGraph Black Box" to "使用{{bbox.name}}."
The introductory paragraph is updated to mention {{bbox.name}} instead of "NebulaGraph Black Box."
The section title "Nebula-BBox 的功能" is updated to "{{bbox.name}}的功能."
The section title "部署 Nebula-BBox" is updated to "部署{{bbox.name}}."
The paragraph mentioning "Nebula-BBox" is updated to "{{bbox.name}}."
The section title "使用 Nebula-BBox" is updated to "使用{{bbox.name}}."
The paragraph mentioning "Nebula-BBox" is updated to "{{bbox.name}}."
The subsection title "查看 Nebula-BBox 版本" is updated to "查看{{bbox.name}}版本."
The subsection title "查看采集的所有指标" remains unchanged.
The subsection title "查看黑匣子文件数据" is updated to "通过{{bbox.name}}查看黑匣子文件数据."
The command examples that mention "nebula-bbox" are updated to "{{bbox.name}}."
Overall, the code changes successfully rename "blackbox" to "{{bbox.name}}" consistently throughout the codebase and documentation. The changes align with the commit message, and the code now reflects the updated naming convention.