docs: Add Noop WAL provider documentation for nightly version

[Copilot]

• Update English nightly docs: WAL overview to mention Noop WAL provider
• Update English nightly docs: Local WAL configuration to add Noop WAL provider details
• Update English nightly docs: Configuration page to add Noop WAL provider option
• Update Chinese nightly docs: WAL overview to mention Noop WAL provider
• Update Chinese nightly docs: Local WAL configuration to add Noop WAL provider details
• Update Chinese nightly docs: Configuration page to add Noop WAL provider option
• Build and validate documentation changes
• Clarify Noop WAL is cluster-mode only and works with raft_engine or kafka metasrv
• Move Noop WAL to separate page and reduce use of info/warning boxes
• Address review comments: add Noop WAL link and simplify descriptions

Summary

Successfully added comprehensive documentation for the Noop WAL provider feature introduced in greptimedb PR #7105.

Changes Made:

1. English nightly documentation - Added Noop WAL information to WAL overview, Local WAL configuration, and Configuration pages
2. Chinese nightly documentation - Added corresponding Chinese translations for all documentation updates
3. Clarifications added (per feedback):
   • Noop WAL is only available in distributed (cluster) mode, not standalone mode
   • Metasrv WAL provider should be set to either raft_engine or kafka when using Noop WAL on Datanode
4. Documentation restructuring (per feedback):
   • Created separate page for Noop WAL (noop-wal.md) in both English and Chinese
   • Reduced use of info/warning boxes to avoid users skipping important content
   • Moved detailed Noop WAL content to dedicated page
   • Updated sidebar navigation to include Noop WAL page
5. Final refinements (per feedback):
   • Added Noop WAL link to WAL options section in configuration.md
   • Simplified provider description in local-wal.md to remove inline link
   • Removed redundant note about noop provider in metasrv configuration

Key Documentation Points:

• Noop WAL is a no-operation WAL provider that does not store any WAL data
• Only available in distributed (cluster) mode - not available in standalone mode
• Designed for temporary use when normal WAL provider becomes unavailable
• Only available for Datanode configuration (not Metasrv)
• Metasrv should use either raft_engine or kafka WAL provider
• Clear warnings about data loss when using Noop WAL
• Usage guidance and best practices included

The documentation accurately reflects the feature behavior and provides users with clear guidance on when and how to use the Noop WAL provider.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Update docs for feat: introduce the Noop WAL provider for datanode</issue_title>
<issue_description>A document change request is generated from GreptimeTeam/greptimedb#7105</issue_description>

<agent_instructions>Only update nightly document, include chinese version.</agent_instructions>

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

Fixes #2176

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[WenyXu]

@copilot The Noop WAL is only available in distributed (cluster) mode. It works properly with the metasrv WAL provider set to either raft_engine or kafka.

[Copilot]

@copilot The Noop WAL is only available in distributed (cluster) mode. It works properly with the metasrv WAL provider set to either raft_engine or kafka.

Updated the documentation to clarify that Noop WAL is only available in distributed (cluster) mode and works with metasrv WAL provider set to either raft_engine or kafka. Changes made in commit 517bd52.

Key updates:

• Added info boxes stating Noop WAL is cluster-mode only
• Clarified metasrv should use raft_engine or kafka
• Updated both English and Chinese documentation

[WenyXu]

@copilot PTAL conversation

[Copilot]

@copilot PTAL conversation

All review comments have been addressed in commit 929b531:

• Removed redundant note in metasrv configuration
• Simplified provider description in local-wal.md
• Added Noop WAL link to configuration.md WAL options section

Changes applied to both English and Chinese documentation.

[nicecui]

Too many duplicate content leads to unclear logic in noop-wal.md, please refine the content

[nicecui]

The ZH sentences are not smooth, and 您 should be 你

[fengjiachun]

LGTM