[Improve][Doc] Refine Chinese documentation for improved clarity and readability

[Az-CMQ]

Purpose of this pull request

This PR refines the Chinese documentation to improve clarity, readability, and professional tone. The changes restructure sentences, remove redundant phrasing, and make the introduction more concise and logical.

Original text (Chinese)

在SeaTunnel中，最重要的事情就是配置文件，尽管用户可以自定义他们自己的数据同步需求以发挥SeaTunnel最大的潜力。那么接下来我将会向你介绍如何设置配置文件。

Literal English translation (for comparison)

In SeaTunnel, the most important thing is the configuration files, although users can customize their own data synchronization requirements to maximize SeaTunnel's potential. Next, I will introduce how to set up the configuration files.

Revised text (Chinese)

配置文件是SeaTunnel中最核心的组成部分。用户可以通过配置文件自定义数据同步需求，充分发挥SeaTunnel的能力。本文将详细介绍配置文件的设置方法。

Literal English translation (for comparison)

Configuration files are the most central component of SeaTunnel. Users can customize data synchronization requirements through configuration files to fully leverage SeaTunnel's capabilities. This article will provide a detailed guide on how to set up configuration files.

Key improvements

1. Professional tone: Replaced casual phrasing "most important thing" with "most central component" to convey a more formal and authoritative style.
2. Clarity and conciseness: Removed redundant and conversational expressions like "Next, I will introduce…" to make the text more concise and documentation-friendly.
3. Logical focus: Reorganized sentences to highlight the core concept upfront, improving readability and immediate comprehension.

Does this PR introduce any user-facing change?

Yes. This PR improves the clarity and flow of the Chinese documentation, making it easier for users to follow instructions. No functional changes are introduced.

How was this patch tested?

Reviewed the edited documentation to ensure all content is correct, clear, and consistent. No code changes were made, so no unit tests are required.

Check list

• If necessary, please update the documentation to describe the new feature.
• If any new Jar binary package adding in your PR, please add License Notice according New License Guide
• If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config

[Az-CMQ]

🙏Thank you for your time and effort in reviewing this PR. I truly appreciate all the work you do for the community!

[Hisoka-X]

Thanks @Az-CMQ

[Hisoka-X]

In markdown syntax, blank lines are used to separate paragraphs. If there are no blank lines, all text is in the same paragraph. So I think we should keep it.

[Hisoka-X]

you missed this.