docs: add page for couchbase_query (CouchbaseQueryVectorStore) and refactor existing Couchbase docs

[ejscribner]

Overview

• Adds a new page illustrating usage for new CouchbaseQueryVectorStore (community[minor]: Create CouchbaseQueryVectorStore langchainjs#8333)
• Refactors existing page path to ensure distinction between couchbase_search and couchbase_query
• Adjusts some language for clarity

Type of change

Type: New documentation page

Related issues/PRs

• GitHub issue:
• Feature PR: community[minor]: Create CouchbaseQueryVectorStore langchainjs#8333

• Linear issue:
• Slack thread:

Checklist

• I have read the contributing guidelines
• I have tested my changes locally using docs dev
• All code examples have been tested and work correctly
• I have used root relative paths for internal links
• I have updated navigation in src/docs.json if needed
• I have gotten approval from the relevant reviewers

Additional notes

[Copilot]

Pull Request Overview

This PR adds documentation for the new CouchbaseQueryVectorStore implementation and refactors existing Couchbase vector store documentation to distinguish between two different approaches: the Query-based implementation (new, preferred) and the Search-based implementation (existing). The changes clarify that Couchbase now offers two methods for vector search using different services.

Key changes:

• Adds comprehensive documentation for CouchbaseQueryVectorStore including setup, usage, indexing options, and comparisons
• Renames existing Couchbase documentation to couchbase_search.mdx to reflect its use of the Search Service
• Updates navigation and card references to distinguish between "Couchbase Query" and "Couchbase Search"

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
src/oss/javascript/integrations/vectorstores/index.mdx	Updates card titles and links to distinguish between Query and Search implementations
src/oss/javascript/integrations/vectorstores/couchbase_search.mdx	Refines title and clarifies this implementation uses the Search Service
src/oss/javascript/integrations/vectorstores/couchbase_query.mdx	New comprehensive documentation page for the Query-based vector store implementation
src/oss/javascript/integrations/providers/all_providers.mdx	Updates provider cards to show both Query (recommended) and Search implementations

[Copilot]

Pull Request Overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

[Copilot]

Pull Request Overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.