[clang-tools-extra] [clang-tidy] Add new check `modernize-use-structured-binding` (PR #158462)

[Baranov Victor via cfe-commits]

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+.. title:: clang-tidy - modernize-use-structured-binding
+
+modernize-use-structured-binding
+================================
+
+Suggests using C++17 structured bindings to decompose pairs.
+
+This check finds three code patterns and recommends using structured bindings for clearer, more idiomatic C++17 code.
+
+1. Decompose a pair variable by assigning its members to separate variables right after its definition:
+
+.. code-block:: c++
+
+  auto p = getPair<int, int>();
+  int x = p.first;
+  int y = p.second;
+
+  into:
+
+  auto [x, y] = getPair<int, int>();
+
+2. Use `std::tie` to decompose a pair into two predefined variables:
----------------
vbvictor wrote:

```suggestion
2. Use ``std::tie`` to decompose a pair into two predefined variables:
```
Language constructs in double-ticks

https://github.com/llvm/llvm-project/pull/158462