docs: Add contributors section to README

[takassh]

Added a contributors section to acknowledge project contributors.

Description

Thank you for opening a Pull Request!
Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

• Follow the CONTRIBUTING Guide.
• Make your Pull Request title start with any of "fix:", "docs:", "feat:" or "BREAKING CHANGE:"
  • ref: https://www.conventionalcommits.org/
• Ensure the tests and linter pass (Run cargo test to test. Run cargo fmt --all to format)
  • No need it because it's docs