[Dev] LiteIPC Simulator

I made a simulator for LiteIPC (https://gitee.com/cctom/liteipc_simulator) so that OpenHarmony components which depend on LiteIPC can be developed/used on Linux systems. Read the README.md before doing anything with the simulator, and if you use it let me know how things go. Constructive comments/suggestions are welcomed. I will try to answer questions if I have time.