Add CMake build verification to CI

[Copilot]

The repository includes CMakeLists.txt but CI only validates Makefile builds. This adds CMake build verification to catch configuration or compatibility issues.

Changes

• Added CMake job to .github/workflows/check.yml:
  • Configures with cmake -B build -S .
  • Builds with cmake --build build
  • Tests the built module with luajit test/test.lua to ensure it works correctly
  • Checks out submodules (required for auxiliar/lua-compat dependencies)
  • Installs build dependencies: libluajit-5.1-dev, libssl-dev
  • Sets permissions: contents: read per GitHub security best practices

The job runs alongside existing checks (valgrind, asan, tsan, coverage) on every push and PR. All 221 tests pass with the CMake-built module.

Original prompt

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This section details on the original issue you should resolve

<issue_title>enhance CI</issue_title>
<issue_description>Please add CMake build check in CI</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes enhance CI #397

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[zhaozg]

@copilot 对于 CMake 的输出成果有做test 吗， 运行 luajit test/test.lua 确保通过

[Copilot]

@copilot 对于 CMake 的输出成果有做test 吗， 运行 luajit test/test.lua 确保通过

Added test step in commit 9a3b90f. The CMake job now runs cd test && LUA_CPATH=../build/?.so luajit test.lua -v to verify the built module works correctly. All 221 tests pass.