clang-format: copy latest and re-format

clang-format-16 has some backwards incompatible changes that require
additional settings for best compatibility and re-running the formatter.
Copy the latest .clang-format from the docs repository and reformat the
repository.

Change-Id: I6bbb587615b9d6f158900201ca04a647cb3a8f96
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/src/signal.cpp b/src/signal.cpp
index 525f2c0..3acba26 100644
--- a/src/signal.cpp
+++ b/src/signal.cpp
@@ -1,6 +1,8 @@
 #include <signal.h>
+
 #include <stdplus/signal.hpp>
 #include <stdplus/util/cexec.hpp>
+
 #include <system_error>
 
 namespace stdplus