* [doc] Migrate dev doc from website repository
* Correct release language
* Fix license issue
* Add all images from website
* Delete unused images
* Add CI
* Fix ci
* fix ci
* Remove no need file
* Add latest commit from website
* correct img_utils.py script
* Remove unused imgs
* Add label `Waiting for reply` to bug/feature label
avoid stale bot close
* Remove bot label-on-issue
We do not need this anymore, cause when issue is created
it would auto add label `waiting for reply` for now
* Change issue/pr stale and close days.
After this PR merged, issue would be close in 37 days
and PR will be close in 127 days.