feat: expanded ACPI support, initial support for S3 sleep

programs/include/Api/Syscall.hpp

@@ -113,6 +113,9 @@ namespace Montauk {
     static constexpr uint64_t SYS_BTLIST       = 87;
     static constexpr uint64_t SYS_BTINFO       = 88;
 
+    // Power management
+    static constexpr uint64_t SYS_SUSPEND      = 89;
+
     // Audio control commands (for SYS_AUDIOCTL)
     static constexpr int AUDIO_CTL_SET_VOLUME = 0;
     static constexpr int AUDIO_CTL_GET_VOLUME = 1;

programs/include/gui/desktop.hpp

@@ -99,6 +99,7 @@ struct DesktopState {
     SvgIcon icon_settings;
     SvgIcon icon_reboot;
     SvgIcon icon_shutdown;
+    SvgIcon icon_sleep;
     SvgIcon icon_logout;
 
     SvgIcon icon_procmgr;

programs/include/montauk/syscall.h

@@ -265,6 +265,10 @@ namespace montauk {
         __builtin_unreachable();
     }
 
+    inline int suspend() {
+        return (int)syscall0(Montauk::SYS_SUSPEND);
+    }
+
     // Mouse
     inline void mouse_state(Montauk::MouseState* out) { syscall1(Montauk::SYS_MOUSESTATE, (uint64_t)out); }
     inline void set_mouse_bounds(int32_t maxX, int32_t maxY) {