Port VPN client CLI from python to GO

[zero88]

Is your feature request related to a problem? Please describe.
Build python to binary always frustrated due to limitation in pyinstaller, build time, multiple arch support and github action workflow setup

Need to support:

• amd64
• armv7 (raspberry/beagleboard)
• arm64/armv8 (raspberry)
• mips32 (onion omega)

Describe the solution you'd like

• Change CLI from python to GO
• Only client part in https://github.com/play-iot/iot-vpn/tree/d98a59e74251e04512784df8cfb21fc4d31b0c70/cli/python/src/client. Such as all commands under client group in: python index.py client -h

[zero88]

@Snaacker Could you evaluate lib dependencies in golang that compare to python. Current dependencies in python for Client CLI is:

• click for CLI parser
• netifaces for query device IP. Actually, it is not mandatory. We can do it in raw python/go
• requests for download lib in debug/dev mode. It's no need in production, we can detach it in prod build

Then, init a mock project with draft PR, then I can build and test with some linux architecture like mips and arm on my side