feat(editor): Change rename node keyboard shortcut to Space on new canvas

[alexgrozav]

Summary

Adds Space as rename keyboard shortcut for nodes.

https://github.com/user-attachments/assets/0354f63b-e6e7-4d6a-84f5-9d22337e2459

Related Linear tickets, Github issues, and Community forum posts

https://linear.app/n8n/issue/CAT-323/change-rename-node-keyboard-shortcut

Review / Merge checklist

• [x] PR title and summary are descriptive. (conventions)
• [ ] Docs updated or follow-up ticket created.
• [x] Tests included.
• [ ] PR Labeled with release/backport (if the PR is an urgent fix that needs to be backported)