[Feature Request] implement Nerd mode.

[mildc055ee]

Description

This PR is the implementation of #188

Motivation and Context

Closes #188

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Screenshots (if appropriate):

How Has This Been Tested?

• [ ] I have tested using MacOS
• [ ] I have tested using Linux

Checklist:

• [x] I have checked that no other PR duplicates mine
• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have updated the tests accordingly.

[mildc055ee]

TODO:

• [ ] make tests
• [ ] update document

[matchai]

Hi @mildc055ee! Thank you for opening a PR. 😄

Spacefish aims to achieve feature-parity with spaceship-prompt, the original prompt that this is a port of. I suggest new feature proposals be made at the spaceship repo, so that we can port it to spacefish when it gets approved.