Integrate complete CMake build system and CI/CD workflows

[xcrtp]

Overview

Based on cmake-project-template and xcmixin, integrate a complete CMake build system and CI/CD workflow.

Tasks

CMake Build System

Add missing cmake files from cmake-project-template:

• cmake/get_version.cmake - Version extraction from CMakeLists.txt
• cmake/install.cmake - Installation configuration
• cmake/install_deps.cmake - Dependency installation (empty for header-only)
• cmake/install_test_deps.cmake - Test dependency installation (Google Test)
• cmake/xc_utils.cmake - Common CMake utilities
• cmake/xcmathConfig.cmake.in - CMake config template

Update CMakeLists.txt:

• Add version handling with get_version.cmake
• Add proper export and install configuration
• Add compiler/standard settings

CI/CD Workflows

Add GitHub Actions workflows from xcmixin:

• .github/workflows/ci.yml - Continuous Integration

  • Build on Ubuntu, macOS, Windows
  • Test with clang and gcc
  • Run tests and examples

• .github/workflows/release.yml - Release workflow

  • Build on all platforms
  • Create release artifacts (tar.gz/zip)
  • Auto-create GitHub release on tag push

• .github/workflows/code-quality.yml - Code quality checks

  • Code formatting check
  • Static analysis (optional)

References

• cmake-project-template
• xcmixin/.github/workflows