Fix: When a third-party tag exists, the generated parameter name is incorrect.
Fix: When the structure in api file is nested more than 2 levels, the parameters cannot be generated correctly.
Fix: When both form and json tag exist, the request body contains redundant fields.
Feature: support obtaining parameter constraints from validate tag
Upgrade goctl and go-zero to v1.6.0, fix #71
When the request method is POST/PUT/PATCH, if the request field does not contain json tag and contains form tag, add "multipart/form-data", "application/x-www-form-urlencoded" to the content-type of the request