feat: add OpenPanel analytics to cloud version

[Siumauricio]

What is this PR about?

Please describe in a short paragraph what this PR is about.

Checklist

Before submitting this PR, please make sure that:

• You created a dedicated branch based on the canary branch.
• You have read the suggestions in the CONTRIBUTING.md file https://github.com/Dokploy/dokploy/blob/canary/CONTRIBUTING.md#pull-request
• You have tested this PR in your local instance. If you have not tested it yet, please do so before submitting. This helps avoid wasting maintainers' time reviewing code that has not been verified by you.

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Greptile Summary

Adds OpenPanel product analytics to the cloud-hosted application alongside the existing Google Tag Manager and HubSpot integrations.

• Configures automatic screen-view, outgoing-link, and attribute tracking.
• Sends events to Dokploy's OpenPanel endpoint with an application-wide site property.
• Adds @openpanel/nextjs and its transitive dependencies to the application package and lockfile.

Confidence Score: 5/5

The pull request appears safe to merge with no actionable defects identified.

OpenPanel is mounted application-wide only after cloud mode is confirmed, while loading, query-error, and self-hosted states render no analytics integration.

_{Reviews (1): Last reviewed commit: "feat: add OpenPanel analytics to cloud v..." | Re-trigger Greptile}

Context used:

• Knowledge Base — Web control plane
• Knowledge Base — Dashboard and client state