Document AI agent activation in message attachments

[svelle]

Added instructions for activating AI agent responses in posts.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: a07c6963-6b5d-4fe2-8f8b-0b590634ef4c

📥 Commits

Reviewing files that changed from the base of the PR and between d5c20d1 and 9e019e5.

📒 Files selected for processing (1)

• site/content/integrate/reference/message-attachments/_index.md

📝 Walkthrough

Walkthrough

This PR adds a new documentation section to the message attachments reference guide. The addition explains how integrations can trigger Mattermost AI agent responses by setting the activate_ai property to "true" in a post's props field, with a JSON example demonstrating the usage.

Changes

Documentation Update

Layer / File(s)	Summary
AI Agent Response Trigger Documentation site/content/integrate/reference/message-attachments/_index.md	New section "Trigger AI agent responses" added, describing how to use props.activate_ai to trigger AI agent responses via incoming webhooks and REST API, with accompanying JSON example.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the main change: documentation about AI agent activation in the context of message attachments, which aligns with the actual content addition.
Description check	✅ Passed	The description accurately relates to the changeset, providing a brief overview of the documentation addition regarding AI agent response activation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch svelle-patch-1

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[github-actions]

Newest code from mattermost has been published to preview environment for Git SHA d5c20d1

[github-actions]

Newest code from mattermost has been published to preview environment for Git SHA 9e019e5