Add var.sass to code

[eeshaanSA]

added variables.sass for easier code setup. Also removed from gitignore.

Description

it is hard to setup the project for programmers and contributors, so added the file.

Related Issue

Motivation and Context

Screenshots (In case of UI changes):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] All new and existing tests have passed and it does not give any unexpected error for the same.