Sup-dolphin-memory-lib

- Return pids from the newest to the oldest
- Add optional self to `Dolphin.find_dolphin()`, making it available to call from instance

Use psutil to achieve cross-platform pid finding.
This also fixes the dependency issue on Linux.

Complete all basic functions, including:
- find dolphin, init shared memory
- read/write raw bytes
- read/write struct
- read/write single value (uint32/16/8, int32/16/8, float)

Base
This library is based on [Yoshi2's dolphin-memory-lib](https://github.com/RenolY2/dolphin-memory-lib)

Copyright (c) 2022 Yoshi2, NerduMiner

and [aldelaro5's Dolphin-memory-engine](https://github.com/aldelaro5/Dolphin-memory-engine)

Copyright (c) 2017 aldelaro5