C++ static analysis and formatting tooling: clang-tidy, clang-format, cppcheck,
include-what-you-use (IWYU), and CI integration patterns.
USE WHEN: user mentions "clang-tidy", "clang-format", "cppcheck", "iwyu",
"include-what-you-use", ".clang-tidy", ".clang-format", "C++ static analysis",
"C++ linter"
DO NOT USE FOR: SonarQube C++ rules (tool-agnostic), Coverity (commercial),
PVS-Studio (commercial)
