feat(vertexai): Add sample retail_v2_search_request

[amcolin]

Description

This PR adds Go implementation parity for the search samples introduced in python-docs-samples #13996.

Changes

• New Snippets: Added searchRequest, searchOffset and searchPagination Go samples.
• Module Setup: Initialized the retail Go module and v2 dependencies.

Fixes Internal b/502581509

For the new test

It needs API enabled for Vertex Search as it is mentioned on the test that are failing:

=== RUN   Test_searchRequest
    search_request_test.go:31: unexpected error: it.Next: rpc error: code = PermissionDenied desc = Vertex AI Search for commerce API has not been used in project 176007320581 before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/retail.googleapis.com/overview?project=176007320581 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry.
        error details: name = ErrorInfo reason = SERVICE_DISABLED domain = googleapis.com metadata = map[activationUrl:https://console.developers.google.com/apis/api/retail.googleapis.com/overview?project=176007320581 consumer:projects/176007320581 containerInfo:176007320581 service:retail.googleapis.com serviceTitle:Vertex AI Search for commerce API]
        error details: name = Help desc = Google developers console API activation url = https://console.developers.google.com/apis/api/retail.googleapis.com/overview?project=176007320581
        error details: name = LocalizedMessage locale = en-US msg = Vertex AI Search for commerce API has not been used in project 176007320581 before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/retail.googleapis.com/overview?project=176007320581 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry.

Checklist

• I have followed Contributing Guidelines from CONTRIBUTING.MD
• Tests pass: go test -v ./.. (see Testing)
• Code formatted: gofmt (see Formatting)
• Vetting pass: go vet (see Formatting)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

[gemini-code-assist]

Code Review

This pull request introduces a new retail package within the vertexai directory, providing a sample implementation for searching products using the Google Cloud Retail API. The feedback focuses on fixing a bug in the search result iteration that could cause an infinite loop, improving the API design by passing a context parameter to the search function, and correcting documentation typos.

[amcolin]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces a new retail package within the vertexai directory, providing sample implementations for product searching using Vertex AI Search for commerce. It includes the searchOffset and searchRequest functions, which support text and browse searches with pagination, along with their respective unit tests. Review feedback identified inconsistencies in the function documentation where parameter descriptions and order did not match the actual code signatures.

[amcolin]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces a new retail package within the vertexai directory, providing sample implementations for product search functionality using the Vertex AI Retail API. The added samples demonstrate how to perform search requests with offsets, handle pagination using page tokens, and execute general text or browse searches. Feedback is provided to correct a typo in a documentation comment and to improve error handling by utilizing the %w verb for error wrapping in Go, as well as fixing a misleading error message in the pagination logic.

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• vertexai/retail/search_offset.go:27, tag retail_v2_search_offset
• vertexai/retail/search_pagination.go:26, tag retail_v2_search_pagination
• vertexai/retail/search_request.go:27, tag retail_v2_search_request

---

This comment is generated by snippet-bot.
If you find problems with this result, please file an issue at:
https://github.com/googleapis/repo-automation-bots/issues.
To update this comment, add snippet-bot:force-run label or use the checkbox below:

• Refresh this comment