…ng and using variables for commands

…nd explicitly invoke build tools from GOPATH/bin.

Adds JWTSecret field to config struct and updates Load function to read JWT_SECRET env var. Includes unit tests for config loading.

Adds migration to enable pgcrypto and unaccent extensions.

Adds password hashing, JWT token generation/validation, and standardized JSON response helpers. Includes unit tests.

Adds PostgreSQL connection pool setup. Implements repositories for Users, Organizations, and Staff with CRUD operations.

Adds AuthHandler with Login/Register endpoints. Configures Chi router, middleware (CORS, Logger), and dependency injection in Server.

Updates Swagger documentation, README project overview, and ROADMAP with current progress.

Adds PULL_REQUEST_TEMPLATE.md with a checklist for verification steps (lint, test, docs, etc.).

Extends CONTRIBUTING.md with detailed development workflow, project structure, coding standards, and a comprehensive step-by-step feature implementation guide.

Updates CONTRIBUTING.md to explain that custom k6 scripts are only needed for critical paths, and simple endpoints can use the generic command. Also includes the fix for k6-auth.js org slug generation.