docs: refactor docs of loader & client for new version(1.7.0)

[sadwitdastreetz]

1. Updated Maven version to 1.7.0 - Updated client dependency version from 1.5.0 to 1.7.0 in both Chinese and English
   documentation
2. Added GraphSpace documentation - Added comprehensive documentation for GraphSpace functionality in both Chinese
   (content/cn/docs/clients/hugegraph-client.md) and English (content/en/docs/clients/hugegraph-client.md) versions:
   - GraphSpace creation and management
   - Graph management within GraphSpaces
   - Complete API interface summary
3. Updated client examples - Modified client connection examples to include GraphSpace parameter ("DEFAULT") in both
   quickstart guides
4. Fixed loader documentation parameters - Updated HugeGraph-Loader documentation to include:
   - Added --graphspace parameter (-gs)
   - Added alternative host parameter (-i)
   - Fixed parameter descriptions

[sadwitdastreetz]

@coderabbitai review

[Copilot]

Pull Request Overview

This PR updates the HugeGraph documentation to reflect version 1.7.0 changes, adds GraphSpace support documentation, and corrects parameter descriptions in the loader documentation.

• Updated Maven version references from 1.5.0 to 1.7.0
• Added comprehensive GraphSpace functionality documentation for client APIs
• Fixed parameter descriptions in loader documentation (graph vs graphspace parameters)

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
content/en/docs/quickstart/toolchain/hugegraph-loader.md	Fixed parameter descriptions and added graphspace parameter
content/en/docs/quickstart/client/hugegraph-client.md	Updated version to 1.7.0 and modernized client examples
content/en/docs/clients/hugegraph-client.md	Added GraphSpace management documentation
content/cn/docs/quickstart/toolchain/hugegraph-loader.md	Fixed parameter descriptions in Chinese version
content/cn/docs/quickstart/client/hugegraph-client.md	Updated version to 1.7.0 in Chinese examples
content/cn/docs/clients/hugegraph-client.md	Added GraphSpace documentation in Chinese

Comments suppressed due to low confidence (5)

content/en/docs/quickstart/toolchain/hugegraph-loader.md:1

• Missing 'N' in the Required column for the -gs or --graphspace parameter. Should be 'N' instead of empty.

---

content/en/docs/quickstart/toolchain/hugegraph-loader.md:1

• Missing backticks around -i parameter. Should be || \-h` or `--host` or `-i` |` for consistency with other parameter formatting.

---

content/cn/docs/quickstart/toolchain/hugegraph-loader.md:1

• Incomplete word in description. '图数据库h' should be '图数据库' (missing character or typo).

---

content/cn/docs/quickstart/toolchain/hugegraph-loader.md:1

• Missing 'N' in the Required column for the -gs or --graphspace parameter. Should be 'N' instead of empty.

---

content/cn/docs/quickstart/toolchain/hugegraph-loader.md:1

• Missing backticks around -i parameter. Should be || \-h` 或 `--host` 或 `-i` |` for consistency with other parameter formatting.

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[imbajin]

⚠️ 代码风格问题：缩进不一致

这里的缩进与上下文不一致，建议使用相同的缩进风格：

```suggestion
.configUser("username", "password")
// 这是示例，生产环境需要使用安全的凭证
.build();
```

应保持一致的缩进，使用空格对齐。

[imbajin]

🧹 格式问题：表格末尾多余空格

这行末尾有多余的空格列分隔符，建议移除：

```suggestion
| `--help` | false | | 打印帮助信息 |
```

[imbajin]

⚠️ 中英文描述不一致

英文版说"four categories"但列举了五种类型，与中文版不一致。建议修改为 "five categories"：

```suggestion
Input sources are currently divided into five categories: FILE, HDFS, JDBC, KAFKA and GRAPH, which are distinguished by the `type` node. We call them local file input sources, HDFS input sources, JDBC input sources, KAFKA input sources and GRAPH input source, which are described below.
```