clang-format to respect indentation width?

[Icy-Thought]

Minor suggestion that I think could improve Apheleia's clang-format definition a little. We could allow Apheleia to determine the desired indentation width of clang-format when apheleia-formatters-respect-indent-level has been enabled + no .clang-format file has been found -> indentation width = tab-width or c-ts-mode-indent-offset.

(unless (locate-dominating-file default-directory ".clang-format")
  (when apheleia-formatters-respect-indent-level
    (format "--style={IndentWidth: %d}" c-ts-mode-indent-offset)))