Support multi-editor selection in interactive flow

[sanathusk]

The current vp create flow only allows users to select a single editor configuration (VSCode, Zed, or None) at editor.ts:160-207. This limitation forces developers who work with multiple editors to either:

• Choose only one editor configuration
• Manually copy configurations after project creation
• Run the create command multiple times with different editor flags

Proposed Solution

Enable multi-editor selection in the vp create interactive flow, allowing users to generate configuration files for multiple editors simultaneously.