docs(dart): (NOT-TO-MERGE) add gRPC integration documentation

[lucas-zimerman]

DESCRIBE YOUR PR

Adds documentation for the upcoming sentry_grpc package introduced in getsentry/sentry-dart#3721.

• Adds includes/dart-integrations/grpc.mdx with full integration docs (requirements, install, configure, failed request capture, breadcrumbs, tracing, verify)

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PRE-MERGE CHECKLIST

Make sure you've checked the following before merging your changes:

• Checked Vercel preview for correctness, including links
• PR was reviewed and approved by any necessary SMEs (subject matter experts)
• PR was reviewed and approved by a member of the Sentry docs team

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Project	Deployment	Actions	Updated (UTC)
sentry-docs	Ready	Preview, Comment	Jun 27, 2026 2:06am

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
develop-docs	Ignored		Jun 27, 2026 2:06am

[sentry]

Bug: The documentation for the sentry_grpc package uses a literal 'X' as a version placeholder instead of the correct version injection syntax.
_{Severity: LOW}

Suggested Fix

Replace the literal 'X' on line 15 with the correct version injection syntax, likely {{@inject packages.version(sentry_grpc)}}, to ensure the correct package version is always displayed in the documentation.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location: includes/dart-integrations/grpc.mdx#L15

Potential issue: The documentation file `includes/dart-integrations/grpc.mdx` contains a
literal character 'X' as a placeholder for the required version of the `sentry_grpc`
package. This will render as-is to the user, causing confusion about which version of
the package is needed. Other parts of the documentation correctly use the `{{@inject
packages.version(...)}}` helper to dynamically insert the correct version number.

_{Did we get this right? 👍 / 👎 to inform future reviews.}

[lucas-zimerman]

correct, it was intentional, the correct version will be resolved once the first gRPC integration is released

[buenaflor]

maybe we should add a short comment

sentry: xyz # or sentry_flutter

something like that, since if you use flutter you should use sentry_flutter instead of only sentry