Deploy multiple files to Zeebe

[barmac]

Describe the bug

With v5.26.0, a new property bindingType was introduced to some elements. It can be set to deployment for Camunda 8.6 diagrams. However, Desktop Modeler supports a single file deployment only. So I cannot benefit from the feature as long as I deploy from Desktop Modeler.

Steps to reproduce

1. Set bindingType to deployment
2. Try to deploy
3. You can only deploy the current diagram

Expected behavior

I can deploy multiple files. Either we could have a concept of process application like in Web Modeler, or simply expose a file picker like in the C7 deployment tool.

Environment

• OS: [e.g. MacOS 10.2, Windows 10]
• Camunda Modeler Version: v5.26.0
• Execution Platform: C8
• Installed plug-ins: [...]

Additional context

Multi-file deployment was discussed in the weekly: https://github.com/bpmn-io/internal-docs/issues/1015#issuecomment-2245121338
Brought up again via Slack: https://camunda.slack.com/archives/GP70M0J6M/p1722590739493789?thread_ts=1722511667.499869&cid=GP70M0J6M

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Depends on #4667

Related to https://github.com/camunda/product-hub/issues/2458

[barmac]

I just discovered that Camunda 8.6.0-alpha.3 will fall back to the latest decision when no decisions were deployed even though bindingType=deployment is set.

[barmac]

I am moving this to the backlog for now.

[nikku]

Note that this is "unusable" only when deploying from the Desktop modeler (where we want to support project awareness / multi-file deployments).

It is fully usable if you deploy or test, process application style, i.e. via spring-zeebe.

I propose we close and/or rephrase this issue to "the ability to deploy multiple files" with Zeebe.

[barmac]

I updated the title to phrase it as feature.

[nikku]

Will be supported as part of a process application (#4667).