[clang-tools-extra] [clang-tidy] Add portability-avoid-platform-specific-fundamental-types (PR #146970)

[Baranov Victor via cfe-commits]

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@@ -0,0 +1,43 @@
+//===--- AvoidPlatformSpecificFundamentalTypesCheck.h - clang-tidy -------*- C++
+//-*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PORTABILITY_AVOIDPLATFORMSPECIFICFUNDAMENTALTYPESCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PORTABILITY_AVOIDPLATFORMSPECIFICFUNDAMENTALTYPESCHECK_H
+
+#include "../ClangTidyCheck.h"
+
+namespace clang::tidy::portability {
+
+/// Find fundamental integer types and recommend using typedefs or fixed-width
+/// types.
+///
+/// Detects fundamental integer types (int, short, long, long long, and their
+/// unsigned variants) and warns against their use due to platform-dependent
+/// behavior. Excludes semantic types like char, bool, wchar_t, char16_t,
+/// char32_t, size_t, and ptrdiff_t.
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vbvictor wrote:

This is redundant, we should place here only first sentence from docs
```suggestion
```

https://github.com/llvm/llvm-project/pull/146970