fix(Edit Image Node): Fix text option

[ayatnkw]

Summary

Edit Image node's text operation isn't working due to the font not being set. This PR fixes this by making 'font' a node parameter instead of an option.

Related Linear tickets, Github issues, and Community forum posts

https://linear.app/n8n/issue/NODE-1521/edit-image-text-option-is-not-working https://community.n8n.io/t/edit-image-node-adding-text-doesnt-work/50593/2

Review / Merge checklist

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