Introduces sessionService.js providing functions for legacy session registration and validation, profile retrieval with skin/cape data, server join handling, and blocked server listing. Integrates with auth and session repositories and includes error handling for various session operations.
Add environment example, update .gitignore, and switch license to AGPL v3. Introduce error handling classes, ESLint config, and main modules for database, logging, certificate management, and utility functions. Add authentication routes, schemas, and service layer for a modular REST API. Update README and set up repository structure for further development.
