feat: Change default network name to Internal Node

[yanguoyu]

1. Download and install Neuron for the first time. We can mock this to delete the network.json file at /Users/{username}/Library/Application Support/Neuron/networks/index.json

before:

after migrate:

2. Has added a new network but not edit the default network

before:

after migrate:

3. Has added a new network and edited the default network

before:

after migrate:

[silySuper]

/package.
Packaging for test is done in 6010412901. @silySuper

[silySuper]

I need to verify that does the internal node whether support edit or not now?

[yanguoyu]

I need to verify that does the internal node whether support edit or not now?

of course