[zhangzhenghao]

Changes

• Fix the clang-format failure in https://github.com/gorse-io/clap.cpp/actions/runs/42492306559/job/128767130580.
• Set IncludeBlocks: Regroup and IncludeCategories to separate local, third-party, and standard/platform headers, in that order.
• Keep implicit main-header priority 0 in the local group and recognize third-party headers in both quote and angle-bracket form, including miniaudio.
• Format all project-owned C/C++ files with the CI-pinned clang-format 18.1.8, including the reported FFT-test line-wrapping violations. No workflow or runtime logic changes.

Verification

• Reproduced the original formatting failure on main (5662969).
• All 59 tracked C/C++ files pass clang-format 18.1.8 --dry-run --Werror.
• Verified every tracked C/C++ file equals formatter output from its base revision under the new configuration.
• An stdin probe covering main/local headers, quoted miniaudio, other third-party headers and STD headers produces exactly three ordered groups; the unsorted probe is rejected by the format check.
• git diff --check passes. Independent read-only review found no blocking issues and confirmed include multisets/non-include content are preserved apart from whitespace.
• Native builds/tests were not run locally for this formatting-only change; remote CI run 42493170869 passed all 9 checks on commit 713852d: clang-format, five platform build/test jobs, and three Rust jobs.