Feat/expanded undo hints

[Huerte]

Type

• Bug fix
• New feature
• Documentation
• Refactor / internal

Overview

added gitgo undo link and gitgo undo push so users can fully revert these actions instead of just doing a local reset. fixed the terminal hints in link, push, and pull that were pointing to the wrong recovery commands.

Changes

• gitgo undo link: removes the remote and soft-resets the initial commit.
• gitgo undo push: soft-resets locally and force-pushes the revert to the remote.
• push and link commands: updated terminal hints on success to point to their specific undo targets instead of the generic undo commit.
• pull command: stopped assuming the autostash is always at index 1 in the recovery hint.
• README.md and CHANGELOG.md: documented the new undo commands and fixed issues.

How to Test

1. pip install -e ".[dev]"
2. run pytest tests/test_undo.py tests/test_push.py tests/test_link.py
3. expected result: all tests pass. you can also run gitgo link or gitgo push on a test repo and see the updated hints on success.

Checklist

• I tested my changes locally and they work
• I updated CHANGELOG.md under the [Unreleased] section
• I updated README.md (if I added or changed a command)
• I added or updated tests for my change (if applicable)
• My change does not break any existing commands (if it does, describe the impact in the Overview)