Enable socks proxy to optimize network connection

[oovm]

This is a network optimization for some regions (mainland China), providing socks5 support for the warg protocol and downstream tools.

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Accessing the global warg server without socks proxy has a high probability of being randomly blocked.

This phenomenon has been confirmed in Shanghai, China and Beijing, China.

The error content is

error: failed to send request to registry server: error sending request for url (https://wa.dev/v1/fetch/checkpoint): error trying to connect: tcp connect error: 由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。 (os error 10060)

Caused by:
    0: error sending request for url (https://wa.dev/v1/fetch/checkpoint): error trying to connect: tcp connect error: 由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。 (os error 10060)
    1: error trying to connect: tcp connect error: 由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。 (os error 10060)
    2: tcp connect error: 由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。 (os error 10060)
    3: 由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。 (os error 10060)

on all network related warg command.

If the problem still exists, users in mainland China should check whether the proxy environment variable has been set

export HTTP_PROXY=socks5://127.0.0.1:7890
export HTTPS_PROXY=socks5://127.0.0.1:7890

[calvinrp]

Thank you for the PR

[calvinrp]

@oovm should we add any instructions to the README?