[clang] [clang-format] Add FilesBeforeFolders option to SortIncludes (PR #208954)

[Savvas Shiakas via cfe-commits]

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@@ -6821,6 +6821,19 @@ the configuration (without a prefix: ``Auto``).
        # include "A.inc"              # include "A.h"
        # include "A-util.h"           # include "A.inc"
 
+  * ``bool FilesBeforeFolders`` When ``true``, sort includes so that files in a directory appear
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Shiakaron wrote:

> This doesn't feel like the correct option name

Naming is hard 😅 Couldn't think of anything else that is descriptive and concise

https://github.com/llvm/llvm-project/pull/208954