feat: improve Fish shell configuration with enhanced alias and clear …

[ShinniUwU]

Pull Request

Description

This PR introduces enhancements to the Fish shell configuration by adding new features:

• New clear Function: Added a function to clear the terminal screen and scrollback buffer.
• System Information Display: Added fastfetch to display system information upon terminal launch.

Motivation and Context

These updates aim to enhance the usability of the Fish shell environment. The new clear function provides a more effective way to clear the terminal as before it wasn't really clearing it you could scroll up, and fastfetch offers useful system information anyone would probably want to put that in their config.fish .

Dependencies

No additional dependencies are required for these changes.

Related Issues

N/A

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation update (non-breaking change; modified files are limited to the documentation)
• [ ] Technical debt (a code change that does not fix a bug or add a feature but makes something clearer for devs)
• [ ] Other (provide details below)

Checklist

• [x] I have read the CONTRIBUTING document.
• [x] My code follows the code style of this project.
• [x] My commit message follows the commit guidelines.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added a changelog entry.
• [ ] I have added necessary comments/documentation to my code.
• [ ] I have added tests to cover my changes.
• [x] I have tested my code locally and it works as expected.
• [x] All new and existing tests passed.

Screenshots

N/A

Additional context

N/A

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Feel free to tweak any part of this description if needed!