* docs: update README to include new authors with contacts

* docs: add example environment variables file

- Added `env.example` file to document required environment variables for local development.
- Included variables for database, application configuration, logging, calendar integration, and Firebase credentials.

* docs: add detailed project guidelines for Junie

* docs: add license information to README

- Added a "License" section to README with details about the MIT license and a link to the LICENSE file.

* docs: revamp README and add CONTRIBUTION guide

- Refactored the "Getting Started" section into "Quick Start" with improved clarity.
- Expanded setup instructions for local and Docker deployments.
- Added link to detailed guides in the project's wiki.
- Introduced a new CONTRIBUTION.md file with comprehensive contribution guidelines and development standards.
- Updated references to project structure and documentation links in README.