allow specify `-query` file charset or encoding detect intelligently

[martianzhang]

Please search the existing issues for relevant feature requests, add upvotes to pre-existing requests.

Feature Description

SOAR output suggestions in UTF-8 by default, but when -query file is encoded by GBK or other charsets, the SQL sample will be printed in mass.

Use Case(s)

soar -query file.sql -query-charset gbk

default -query-charset should be intelligent.

Ref:

• https://github.com/djimenez/iconv-go
• https://github.com/saintfish/chardet