Replaced Markdown issue templates with structured YAML templates for bug reports, feature requests, performance issues, deployment help, and platform support. Added .prettierrc.json and .prettierignore for code formatting, a detailed CONTRIBUTING.md, and a pull request template. Updated CODE_OF_CONDUCT.md and README.md to reference new contribution guidelines. Added ESLint config, test scripts, and initial test files to improve project maintainability and onboarding.
