Add CI workflow for main branch tests

[ViTeXFTW]

Summary

This PR introduces a dedicated GitHub Actions workflow for running tests on the main branch, replacing the previous PR-based test workflow reference.

Key Changes

• Added .github/workflows/main-tests.yml: New workflow that runs on every push to main and on manual dispatch

  • Configured with a test build type environment variable
  • Tests across multiple platforms and compilers:
    • Linux: GCC and Clang
    • Windows: MSVC and Clang
  • Includes dependency installation for Linux (compiler, CMake, Ninja)
  • Runs CMake configuration, build, and CTest with failure output
  • Uses recursive submodule checkout for dependencies

• Updated README.md: Changed the test status badge to reference the new main-tests.yml workflow instead of the previous pr-test.yml workflow

Implementation Details

• The workflow uses a matrix strategy with fail-fast: false to ensure all platform/compiler combinations are tested even if one fails
• Platform-specific steps handle differences between Linux and Windows (dependency installation and CMake configuration)
• Compiler environment variables (CC/CXX) are only set for Linux jobs where they're needed

https://claude.ai/code/session_01GGUqtnAHdmrCDegnjHRFpY

[ViTeXFTW]

@greptileai

[greptile-apps]

Greptile Summary

This PR adds a dedicated CI workflow for testing the main branch, ensuring continuous validation of production code.

Key Changes:

• Added main-tests.yml workflow that runs on pushes to main and manual dispatch
• Tests run across 4 configurations: Linux (gcc/clang) + Windows (msvc/clang)
• Updated README badge to show main branch test status instead of PR test status
• Workflow structure mirrors the existing pr-test.yml test job for consistency

The implementation is clean and follows the existing patterns from pr-test.yml. All referenced CMake presets (gcc-test, clang-test, msvc-test) exist in the project's CMakePresets.json.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The workflow file is well-structured, follows established patterns from the existing pr-test.yml, and only adds new functionality without modifying existing code. The README change is a simple badge URL update.
• No files require special attention

Important Files Changed

Filename	Overview
.github/workflows/main-tests.yml	New workflow for main branch testing - correctly configured with matrix strategy for Linux (gcc/clang) and Windows (msvc/clang), proper dependency installation, and test execution
README.md	Updated test badge to reference new main-tests.yml workflow instead of pr-test.yml

_{Last reviewed commit: e8e209e}