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.

host/src/vk_layer_setup.hpp

@@ -10,8 +10,7 @@
 
 #include <string>
 
-namespace coop
-{
+namespace coop {
 
 // Register the implicit layer (HKCU) and scope it to `target_image` (the game's exe basename,
 // e.g. "game.exe"). Returns true on success. Idempotent.