* Description:[fix] remove useless sig config file

* Description:[fix] uniform sig's name and content

Signed-off-by: Nguoguoliu <13493540@qq.com>

!433 Create etherpad real-time collaborative editor Bug: #I4AVG6 Test: The etherpad editor could normally access and editor
* Description:[feature] Create etherpad real-time collaborative editor

* Description:[fix] change IRC from slack to zulip

* Description:[fix] update meeting minutes template for sig team

* Description:[fix] format file type from dos2unix
* Description:[fix] fixed SIG information and format

* Description:[fix] update sig template

* update sig/sig-template/sig_template_cn.md.
* update sig/README.md.
* update release-management/Release-Testing-Version.md.

* 重命名 sig/sig-template/oh-enhancement-proposal_en.md 为 sig/sig-template/oep_en.md
* 重命名 sig/sig-template/oh-enhancement-proposal_cn.md 为 sig/sig-template/oep_cn.md
* update description for create new SIG steps 
* delete graduation-criteria for english docs
* delete graduation-criteria for chinese docs
* modify sigs.json
* update user story to user scenario
* modify " 用户故事" to "用户场景" 
* update sig/sig-template/oh-enhancement-proposal_en.md. delete drawbacks.
* update sig/sig-template/oh-enhancement-proposal_cn.md. delete drawbacks.
* add openharmony sig enhancement proposal template
* update SIG english template , include goals , scope repo members 
* update SIG template, include scope and target , members  
* update SIG readme

Bug: NA
Test: NA