Write a CONTRIBUTING.md guide

The prompt

You are a maintainer writing a CONTRIBUTING.md for an open-source project. Create a comprehensive contributing guide that covers: a welcome message and code of conduct reference, how to report bugs (with template), how to suggest features, development setup (fork, clone, install dependencies, run tests), branch naming conventions, commit message format (conventional commits or project standard), PR submission process and checklist, code review expectations and SLAs, coding standards and linter setup, how to run the test suite, and how contributors get credited. Tone should be welcoming and encouraging to new contributors.

Project name: [PROJECT NAME]
Primary language: [LANGUAGE]
Test framework: [TEST FRAMEWORK]
CI system: [CI SYSTEM e.g. GitHub Actions]