docs: add PARALLELISM option for COPY DATABASE and CLI tools

[Copilot]

What's Changed in this PR

Documents the PARALLELISM option added to COPY DATABASE SQL command and CLI tools in GreptimeTeam/greptimedb#7213.

SQL Documentation Changes:

• Added PARALLELISM parameter to COPY DATABASE syntax definition
• Documented behavior: controls concurrent table operations, defaults to CPU cores, minimum 1
• Added examples for both export and import operations

-- Export all table data using 4 parallel operations
COPY DATABASE public TO '/tmp/export/' WITH (FORMAT='parquet', PARALLELISM=4);

-- Import files using 8 parallel operations
COPY DATABASE public FROM '/tmp/export/' WITH (FORMAT='parquet', PARALLELISM=8);

CLI Documentation Changes:

• Export tool: Updated --export-jobs to --db-parallelism (with -j and --export-jobs as aliases) and added --table-parallelism option (default: 4)
• Import tool: Updated --import-jobs to --db-parallelism (with -j and --import-jobs as aliases)
• Added clear descriptions distinguishing database-level vs table-level parallelism

Chinese Localization:

• Added Chinese translations for all SQL COPY DATABASE documentation updates
• Added Chinese translations for all CLI tool documentation updates

Text Polishing:

• Improved English text for native readability and natural flow
• Enhanced Chinese text for native fluency and clarity
• Maintained all technical content, formatting, and structure

Checklist

• Please confirm that all corresponding versions of the documents have been revised.

• Please ensure that the content in sidebars.ts matches the current document structure when you changed the document structure.

• This change requires follow-up update in localized docs.

• Fixes Update docs for feat: support parallel table operations in COPY DATABASE #2212

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Update docs for feat: support parallel table operations in COPY DATABASE</issue_title>
<issue_description>A document change request is generated from GreptimeTeam/greptimedb#7213</issue_description>

<agent_instructions>update nightly docs</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Update docs for feat: support parallel table operations in COPY DATABASE #2212

---

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View logs

[WenyXu]

@copilot Please update cli doc. BTW, add Chinese version

[Copilot]

@copilot Please update cli doc. BTW, add Chinese version

Updated CLI documentation and added Chinese version in commit 75d8c74.

Changes include:

• CLI export tool: Updated --export-jobs to --db-parallelism and added --table-parallelism option
• CLI import tool: Updated --import-jobs to --db-parallelism
• Chinese translations for both SQL COPY DATABASE and CLI documentation

[WenyXu]

@copilot Polish the text while respecting its original style and tone. Ensure English reads like native English, and Chinese reads like native Chinese. Keep technical content, formatting, and structure intact. Provide the polished version only.

[Copilot]

@copilot Polish the text while respecting its original style and tone. Ensure English reads like native English, and Chinese reads like native Chinese. Keep technical content, formatting, and structur...

Could you please specify which text you'd like me to polish? I've updated the following files:

• docs/reference/sql/copy.md (English SQL docs)
• docs/reference/command-lines/utilities/data.md (English CLI docs)
• i18n/zh/docusaurus-plugin-content-docs/current/reference/sql/copy.md (Chinese SQL docs)
• i18n/zh/docusaurus-plugin-content-docs/current/reference/command-lines/utilities/data.md (Chinese CLI docs)

Please let me know which section(s) need polishing, or if you'd like me to review and polish all the text I added.

[WenyXu]

@copilot Polish all text while respecting its original style and tone. Ensure English reads like native English, and Chinese reads like native Chinese. Keep technical content, formatting, and structure intact. Provide the polished version only.

[Copilot]

@copilot Polish all text while respecting its original style and tone. Ensure English reads like native English, and Chinese reads like native Chinese. Keep technical content, formatting, and structur...

Polished all documentation text in commit 0935110.

English improvements:

• More natural phrasing: "if a database contains 30 tables" instead of "if a database has 30 tables"
• Clearer syntax: "set to 8" instead of just "is 8"
• Simplified comments: "using 4 parallel operations" instead of "with 4 parallel table operations"

Chinese improvements:

• More natural expressions: "数据库包含 30 个表且 PARALLELISM 设置为 8 时" (when database contains... and is set to...)
• Removed unnecessary conditional words for better flow
• Simplified action descriptions: "使用 4 个并行操作" instead of "使用 4 个并行表操作"

All technical content, formatting, and structure remain intact.

[fengjiachun]

LGTM