Add contribution guidelines

[hramberger]

Added contribution guidelines and local setup instructions to the project.
Closes #413

PR Checklist

• Wrote a good commit message & description according to conventional commits [see guide below].
• The PR is linked to an issue.
• Added/Updated unit tests.
• All unit tests are passing.
• Used the same coding conventions as the rest of the project.
• The PR relates to only one subject with a clear title
• The PR description uses grammatically correct, complete sentences.

Approver/Reviewer Checklist

• Before merge squash related commits or rebase branch.

Other Information

Conventional commits