Apply clang-format across the whole tree

Run clang-format (the repo's .clang-format: LLVM base, 120 cols, tabs,
Allman functions) over every source file so the tree is formatter-clean.
Whitespace only -- no behavior change; full x64 + x86 suites pass.

Also set SortIncludes: false in .clang-format. Windows include order is
load-bearing (windows.h must precede tlhelp32.h / mmreg.h / xinput.h /
dinput.h; winsock2.h must precede windows.h), and the default
alphabetical sort reorders tlhelp32.h ahead of windows.h -- a build
break. Leaving order alone keeps the manual, correct grouping.

tests/audio_overrides_test.cpp

@@ -12,18 +12,14 @@
 
 using namespace coop;
 
-namespace
-{
+namespace {
 int g_failures = 0;
 void check(bool ok, const char* what)
 {
-	if (!ok)
-	{
+	if (!ok) {
 		std::printf("FAIL: %s\n", what);
 		++g_failures;
-	}
-	else
-	{
+	} else {
 		std::printf("  ok: %s\n", what);
 	}
 }
@@ -93,8 +89,7 @@ int main()
 	}
 
 	DeleteFileW(path.c_str());
-	if (g_failures == 0)
-	{
+	if (g_failures == 0) {
 		std::printf("PASS audio_overrides_test\n");
 		return 0;
 	}