[FEATURE] Iterative PR Workflow for feature-dev Plugin

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

The feature-dev plugin implements entire features in a single monolithic phase, which can create large changesets that are difficult to code review in professional development environments. Teams need smaller, logical increments that can be reviewed and merged iteratively.

Current workflow doesn't support collaborative development practices where code review and incremental delivery are essential.

Proposed Solution

Break Phase 5 (Implementation) into logical chunks with PR creation between each increment.

User can review and approve each PR before the next increment begins.

Alternative Solutions

• Add manual checkpoints where user can pause and create PRs
• Provide "implementation chunks" as separate commands
• Integrate with existing PR workflows in the repository

Priority

Medium - Would be very helpful

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_