Dependency: backbone-undo is deprecated (npm) — any plan to replace/remove?

### GrapesJS version
0.22.14 (latest release as of 2025-11-20)

### What's the expected behavior?
No deprecated dependencies in the GrapesJS install tree (or guidance/roadmap on replacing them).

### What's the current behavior?
Installing grapesjs@0.22.14 emits an npm/pnpm deprecation warning because it depends on backbone-undo@0.2.6 (deprecated on npm).

### Steps to reproduce
1. pnpm add grapesjs@0.22.14 (or npm i grapesjs@0.22.14)
2. Observe the deprecation warning for backbone-undo@0.2.6

### Additional context
- This is not a vulnerability report by itself; it's a maintenance/support risk (supply-chain concern).
- Related historical issue: #3443 addressed the underscore advisory path; this report is specifically about the package deprecation status.
- Question: is there a plan to remove/replace backbone-undo, or should consumers treat this as "won't fix" and ignore the warning?