refactor: move json related header vars to internal (zeromicro#1840)

* refactor: move json related header vars to internal

* refactor: use header.ContentType

refactor: move json related header vars to internal (zeromicro#1840)

* refactor: move json related header vars to internal

* refactor: use header.ContentType

feat: simplify httpc (zeromicro#1748)

* feat: simplify httpc

* chore: fix lint errors

* chore: fix log url issue

* chore: fix log url issue

* refactor: handle resp & err in ResponseHandler

* chore: remove unnecessary var names in return clause

Support `goctl env install` (zeromicro#1752)

Co-authored-by: anqiansong <anqiansong@bytedance.com>

Mkdir if not exists (zeromicro#1659)

Co-authored-by: anqiansong <anqiansong@bytedance.com>

Revert "🐞 fix(gen): pg gen of insert (zeromicro#1591)" (zeromicro#1598)

This reverts commit cc4c492.

fix issue of default migrate version (zeromicro#1536)

* fix issue of default migrate version

* chore: update console colors

refactor: refactor yaml unmarshaler (zeromicro#1517)

chore: update goctl version (zeromicro#1497)

fix: goctl not compile on windows (zeromicro#1500)