feat: add keyboard layout support

kernel/src/Api/BuildNo.hpp

@@ -12,4 +12,4 @@
 
 #pragma once
 
-#define MONTAUK_BUILD_NUMBER 109
+#define MONTAUK_BUILD_NUMBER 116

kernel/src/Api/Keyboard.hpp

@@ -54,6 +54,9 @@ namespace montauk::abi {
         outEvent->shift    = k.Shift;
         outEvent->ctrl     = k.Ctrl;
         outEvent->alt      = k.Alt;
+        outEvent->capslock = k.CapsLock;
+        outEvent->altgr    = k.AltGr;
+        outEvent->extended = k.Extended;
     }
 
     static char Sys_GetChar() {

kernel/src/Api/Syscall.hpp

@@ -458,6 +458,13 @@ namespace montauk::abi {
         bool    shift;
         bool    ctrl;
         bool    alt;
+        bool    capslock;
+        // Right Alt held, reported separately from alt so keyboard layouts can
+        // use it as AltGr without swallowing left-Alt shortcuts.
+        bool    altgr;
+        // Key came from an E0-prefixed scancode (keypad "/" and Enter share a
+        // scancode with the main-block keys). Layout translation must skip it.
+        bool    extended;
     };
 
     struct MouseState {