Also renames `forgot_password` translation key to
`forgot_password_title` and `forget_password` to
`forgot_password`

Includes entry in CHANGELOG about the breaking change
(and some markdown fixes in there)

* social_register_hepler_msg -> social_register_helper_msg

* register_hepler_msg -> register_helper_msg

* Redirects for renamed repos

* Remove unused phrase from locales

* add default values for settings

* more default values

* more default settings and labels resource

* mv locale to options

* Add Korean support

* replace Gogs to Gitea