VS Code extension for native IDE integration

[LiranCohen]

Summary

Create a VS Code extension that provides native IDE integration with dwn-git repos.

Context

This is the only unchecked item in the Phase 5 roadmap (PLAN.md line 1369). It is explicitly scoped as a separate repository, to be started post-stabilization.

Scope

• Browse DWN-hosted repos from the sidebar
• Create/view issues and patches inline
• Push/pull via git-remote-did integration
• DID-based identity management
• Code review UI for patches

Notes

• Should be a separate repo (enboxorg/dwn-git-vscode or similar)
• Depends on the GitHub API shim for partial compatibility, but native integration preferred
• PLAN.md Section 11.6 describes the long-term vision for native integrations