feat: unify system status codes

kernel/src/Api/Audio.hpp

@@ -36,12 +36,12 @@ namespace montauk::abi {
                                                        bitsPerSample, pid, name);
         }
 
-        return -1;
+        return NoDevice;
     }
 
     static int64_t Sys_AudioClose(int handle) {
         Drivers::Audio::Mixer::Close(handle);
-        return 0;
+        return Success;
     }
 
     static int64_t Sys_AudioWrite(int handle, const uint8_t* data, uint32_t size) {