feat: add SYS_GETCAPS syscall to retrieve process capabilities

kernel/src/Api/Syscall.cpp

@@ -510,6 +510,9 @@ namespace montauk::abi {
                 // holds no device capability to spend on it.
                 if (!UserMemory::Writable<BatteryInfo>(frame->arg1)) return -1;
                 return Sys_BatteryInfo((BatteryInfo*)frame->arg1);
+            case SYS_GETCAPS:
+                if (!UserMemory::Writable<SpawnCapabilities>(frame->arg1)) return -1;
+                return Sys_GetCaps((SpawnCapabilities*)frame->arg1);
             case SYS_THREAD_SPAWN:
                 return Sys_ThreadSpawn(frame->arg1, frame->arg2, frame->arg3);
             case SYS_THREAD_EXIT: