refactor(neuron-wallet): refactor node service

[Keith-CY]

1. move ckb core into node service;
2. add network switching on active network updating;
3. check active network on initApp;
4. add basic check on the network url, protocol required;

[classicalliu]

why not use service instead of controller

[classicalliu]

I means use service directly, not use controller.service

[Keith-CY]

I means use service directly, not use controller.service

The service was instantiated in the Controller, you mean instantiating one more here?

[Keith-CY]

or just create one somewhere, and controller also use that one

[classicalliu]

I think it's better to remove controller in logic level, but we can do this later

[Keith-CY]

make sense. I'm going to use dependency inject in the future.