Feature: Rebase Operations

[BishopMowle]

Context

Reworked from Issue #6. Rebase is complex and deserves its own issue.

Commands to Implement

Command	Description
rebase	Reapply commits on top of another base
rebase -i	Interactive rebase (optional, if time permits)

Acceptance Criteria (AC)

AC1: Basic Rebase

• Can rebase current branch onto target branch
• Replays commits in order
• Handles fast-forward scenarios

AC2: Conflict Handling During Rebase

• Detects conflicts during replay
• Reports conflict location
• Supports abort on conflict

AC3: Rebase Integrity

• Preserves commit metadata (author, date, message)
• Generates new commit SHAs
• Updates HEAD after successful rebase

AC4: Type Safety

• All functions have strict TypeScript types
• No any or unknown types

Definition of Done (DoD)

• Rebase command implemented with error handling
• Unit tests (>80% coverage)
• Interop tests passing (canonical git CLI)
• Documentation in README.md
• Zero TypeScript errors/warnings

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Waiting for approval before implementation