Use clang-tidy to express and validate coding conventions

.clang-tidy

@@ -0,0 +1,36 @@
+Checks: >
+  -*,
+  -abseil-*,
+  -altera-*,
+  -android-*,
+  boost-*,
+  bugprone-*,
+  cert-*,
+  clang-analyzer-*,
+  concurrency-*,
+  cppcoreguidelines-*,
+  -cppcoreguidelines-pro-bounds-array-to-pointer-decay,
+  -cppcoreguidelines-avoid-non-const-global-variables,
+  -cppcoreguidelines-non-private-member-variables-in-classes,
+  darwin-*,
+  -fuchsia-*,
+  -google-*,
+  -hicpp-*,
+  -linuxkernel-*,
+  -llvm-*,
+  -llvmlibc-*,
+  misc-*,
+  -misc-non-private-member-variables-in-classes,
+  modernize-*,
+  -modernize-use-auto,
+  -modernize-use-trailing-return-type,
+  -modernize-use-nodiscard,
+  -mpi-*,
+  -objc-*,
+  -openmp-*,
+  performance-*,
+  portability-*,
+  readability-*,
+  -readability-function-cognitive-complexity,
+  -readability-implicit-bool-conversion,a
+  -zircon-*,