Key bindings layer: skills on 1-7, weapon sets on F1-F7

Raw WM_KEYDOWN/WM_KEYUP are handled in both window procedures (the game
swaps 0x8110d0 and 0x8122a0 with SetWindowLong; 0x8110d0 is the in-game
one). Bound keys are swallowed and post the original hotkey's key event
to the kernel, so F-keys work and bindings are layout independent
([keys] in sacred_re.ini). Replaces the WASD hotkey remap and the digit
swap; W/A/S/D and the digit row no longer reach the game. Skill keys
still cast through the right mouse button. Enabled switches removed.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/mods/borderless.cpp

@@ -34,6 +34,7 @@
 #include "game/engine/input.h"
 #include "game/render/dx_driver7.h"
 #include "mods/hud.h"
+#include "mods/input.h"
 #include "mods/widescreen.h"
 #include "re/config.h"
 #include "game/addresses.h"
@@ -215,6 +216,9 @@ void __cdecl GetMouseClientPos(HWND window, POINT* position) {
 }
 
 LRESULT CALLBACK MainWindowProc(HWND window, UINT message, WPARAM wParam, LPARAM lParam) {
+    if (mods::input::HandleWindowMessage(window, message, wParam, lParam)) {
+        return 0;
+    }
     if (!g_viewport.active || window != g_viewport.window) {
         return MainWindowProc_original(window, message, wParam, lParam);
     }