Initial commit

[coolamit]

This pull request introduces the initial setup for a Go-based CLI tool (mmd-cli) that converts Mermaid diagrams to SVG, PNG, and PDF formats. The changes cover build and release automation, cross-platform support, Docker integration, dependency management, and comprehensive documentation. The most important changes are grouped below:

Build, Release, and CI Automation

• Added GitHub Actions workflows for testing (.github/workflows/test.yml) and automated releases (.github/workflows/release.yml), enabling CI/CD for the project. [1] [2]
• Introduced .goreleaser.yml for cross-platform builds and packaging, supporting Linux and macOS (x64 and ARM64), and automating changelog and checksums.

Docker Integration

• Added a production-ready Dockerfile that builds the CLI binary and bundles Chromium for headless rendering, plus a compose.yaml for easy container orchestration. [1] [2]
• Created .dockerignore to exclude unnecessary files from Docker builds, improving build efficiency.

Cross-Platform Build & Development Tools

• Added a detailed Makefile with targets for building, testing, formatting, cross-compiling for multiple platforms, and Docker management.
• Provided an install script (install.sh) for quick detection of OS/architecture, Chrome/Chromium presence, and fetching the latest binary release.

Dependency Management

• Added go.mod for Go module and dependency tracking, including chromedp for browser automation and cobra for CLI parsing.

Documentation

• Introduced a comprehensive README.md covering installation methods, requirements, usage examples, CLI flags, configuration options, Docker usage, and cross-compilation instructions.