Add a check_api_compatibility CI job that uses esp-api-check to detect
breaking API changes in merge requests. The job compares API
declarations between the MR base and head commits using libclang, and
posts a discussion thread on the MR if WARNING or BREAKING changes are
found.
- Add CI job in host-test.yml with clang toolchain and allow_failure
- Add test_api_check project for CMake configuration with all
components enabled
- Define __DOXYGEN__ and IDF_DOC_BUILD so the checker can see
declarations behind these guards
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
