Sweep: add contributor guidelines (✓ Sandbox Passed)

[superbarne]

Description

This pull request adds contributor guidelines to the CONTRIBUTING.md file.

Summary

• Added instructions for navigating to the frontend directory in CONTRIBUTING.md
• Included steps for installing dependencies and running the development server
• Provided detailed steps for submitting changes to the project

Fixes #71.

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🎉 Latest improvements to Sweep:

• New dashboard launched for real-time tracking of Sweep issues, covering all stages from search to coding.
• Integration of OpenAI's latest Assistant API for more efficient and reliable code planning and editing, improving speed by 3x.
• Use the GitHub issues extension for creating Sweep issues directly from your editor.

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💡 To get Sweep to edit this pull request, you can:

• Comment below, and Sweep can edit the entire PR
• Comment on a file, Sweep will only modify the commented file
• Edit the original issue to get Sweep to recreate the PR from scratch

[superbarne]

Rollback Files For Sweep

• Rollback changes to CONTRIBUTING.md

[superbarne]

the contributer guidlelines need to be in the README.md

[danielswiatek]

use the tasks for instructions and add a list of all contributors from project with profile picture as circle