Make OsmiCSX compatible for react native version < 0.64

[DeVoresyah]

Currently, we're using MobX-State-Tree to support our Dark Theme. But, it makes OsmiCSX doesn't compatible with the project that still using react-native version < 0.64.x

So, I found an alternative way to make it compatible. Create global hooks and refactor dark theme system into it, if you have any questions feel free to