feat: Add rootly.createEvent component

[devroy10]

Description

Closes #2821

This PR adds the Rootly Create Event action so SuperPlane workflows can post timeline notes/annotations to Rootly incidents. The action targets Rootly’s incident events endpoint and supports optional visibility (internal/external) while keeping defaults consistent with Rootly.

Video Demo

rootly-create-event.mp4

Backend Implementation

• Added rootly.createEvent action with incidentId, event, and optional visibility validation in setup.
• Implemented Rootly client support for POST /incidents/{id}/events with JSON:API request/response structs for incident events.
• Emits rootly.incident.event on success with id, event, visibility, occurred_at, and created_at.
• Added example output fixture and unit tests covering success and error paths.

Frontend Implementation

• Added Rootly Create Event mapper to render execution details and metadata for incident ID and visibility.
• Introduced IncidentEvent type and details formatter to display event content, visibility, and timestamps.
• Registered the new mapper and event state registry for consistent execution state handling.
• Reuses Rootly icon and color patterns to match existing integration styling.

Documentation

• Auto-generated component documentation via relevant make command

Checklist

• Tests (existing + new component) pass
• Code compiles without errors
• Signed-off commits
• Example output JSON (if required)
• Updated component documentation
• Attached video of component working

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[devroy10]

@AleksandarCole Video demo added, ready for review

[AleksandarCole]

@devroy10 tested it - works great. No major changes needed so I will kick off code review right away.

minor thing: If you get the chance, please remove "Occurred at" from details tab and put "Created at" at the top.

[forestileao]

Hello, thank you for the PR. Just added one comment. The rest looks really good :)

[forestileao]

@devroy10 All Good :)
Reach @AleksandarCole to get your bounty!
Thanks for contributing with SuperPlane!

[AleksandarCole]

@devroy10 bounty paid via BountyHub