Integrated the static CSS file into the base.html

[codecShivam]

Fixes

Fixes #15 by @codecShivam

Description

This pull request implements the setup of FastAPI for serving a static CSS file. It includes the addition of a sample CSS file (style.css) and its integration into the Jinja2 template (base.html). The goal is to enhance the styling capabilities of the FastAPI application. @SAMAD101 kindly review it!!

Technical details

Tests

Screenshots

Checklist

• [ ] My pull request has a descriptive title (not a vague title like Update index.md).
• [ ] My pull request targets the default branch of the repository (main or master).
• [ ] My commit messages follow best practices.
• [ ] My code follows the established code style of the repository.
• [ ] I added or updated tests for the changes I made (if applicable).
• [ ] I added or updated documentation (if applicable).
• [ ] I tried running the project locally and verified that there are no visible errors.