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.

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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.

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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).

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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.

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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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