fix(workflow): validate node compatibility when importing dsl between chatflows and workflows

[yangzheli]

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Summary

fix #24883

• Use js-yaml to parse dsl content, and validate node compatibility when importing dsl between chatflows and workflows in the frontend. The valid nodes include:

Screenshots

Before

• import workflow with end node

https://github.com/user-attachments/assets/85fb041a-7694-4dca-acc9-6b090fbc7bb9

• import workflow with trigger node, however these trigger features are only available for workflows

After

• import workflow without end/trigger node

https://github.com/user-attachments/assets/c4a40729-9920-484a-9b87-afe0ec2d60f9

• import workflow with end/trigger node

https://github.com/user-attachments/assets/298fe81f-e667-478d-abcd-6ec2afd96d6b

Checklist

• [ ] This change requires a documentation update, included: Dify Document
• [x] I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• [x] I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• [x] I've updated the documentation accordingly.
• [x] I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

[yangzheli]

@crazywoola PTAL.