Add intial translation of the figures for the chapters of graph, searching, and sorting

[krahets]

If this pull request (PR) pertains to Chinese-to-English translation, please confirm that you have read the contribution guidelines and complete the checklist below:

• [x] This PR represents the translation of a single, complete document, or contains only bug fixes.
• [x] The translation accurately conveys the original meaning and intent of the Chinese version. If deviations exist, I have provided explanatory comments to clarify the reasons.

If this pull request (PR) is associated with coding or code transpilation, please attach the relevant console outputs to the PR and complete the following checklist:

• [ ] I have thoroughly reviewed the code, focusing on its formatting, comments, indentation, and file headers.
• [ ] I have confirmed that the code execution outputs are consistent with those produced by the reference code (Python or Java).
• [ ] The code is designed to be compatible on standard operating systems, including Windows, macOS, and Ubuntu.

[krahets]

Please review the translation based on the following aspects:

1. Ensure the expression is authentic and accurate.
2. Maintain consistency between the Chinese and English versions. (Balancing with point 1)
3. Since English is significantly longer than Chinese, some of the content has been simplified, resulting in poorer consistency. Please only add comments if you think it's ambiguous.

In addition to content, please pay attention to the format:

1. It is expected to use Roboto font for normal text and Roboto Mono for formulas and code. These may be prone to mistakes since they are set manually.
2. The style and color of shapes and texts should be consistent between the two versions. (I made some color adjustments in the EN version to enhance readability, so please only report those that feel uncomfortable to you.)

[krahets]

Thanks for your thorough review! @pengchzn, @RafaelCaso, @K3v123, most of the comments have been addressed. A few comments remain unresolved for further discussion. Please let me know if there's anything else that needs fixing.