[clang] [clang-format] Add new option: WrapNamespaceBodyWithNewlines (PR #106145)

[Björn Schäpers via cfe-commits]

================
@@ -1493,6 +1511,18 @@ static auto computeNewlines(const AnnotatedLine &Line,
     Newlines = 1;
   }
 
+  // Insert empty line after "{" that opens namespace scope
----------------
HazardyKnusperkeks wrote:

```suggestion
  // Insert empty line after "{" that opens namespace scope.
```

https://github.com/llvm/llvm-project/pull/106145