feat: add is_terminal_attached syscall

kernel/src/Api/Syscall.cpp

@@ -626,6 +626,8 @@ namespace montauk::abi {
 
                 return 0;
             }
+            case SYS_TERMINAL_ATTACHED:
+                return Sys_TerminalAttached();
             default:
                 return -1;
         }
@@ -652,7 +654,8 @@ namespace montauk::abi {
         Hal::WriteMSR(Hal::IA32_FMASK, 0x200);
 
         Kt::KernelLogStream(Kt::OK, "Syscall") << "SYSCALL/SYSRET initialized (LSTAR="
-            << kcp::hex << (uint64_t)SyscallEntry << kcp::dec << ", 171 syscall slots)";
+            << kcp::hex << (uint64_t)SyscallEntry << kcp::dec << ", "
+            << (SYS_TERMINAL_ATTACHED + 1) << " syscall slots)";
     }
 
 }