* Add database migrations for merge whitelist

* Add merge whitelist settings for protected branches

* Add checks for merge whitelists

Signed-off-by: Wendell Sun <iwendellsun@gmail.com>

* refactor struct's time to remove unnecessary memory usage

* use AsTimePtr simple code

* fix tests

* fix time compare

* fix template on gpg

* use AddDuration instead of Add

* Add branch overiew page

* fix changed method name on sub menu

* remove unused code

* improve protected branch to add whitelist support

* fix lint

* fix style check

* fix tests

* fix description on UI and import

* fix test

* bug fixed

* fix tests and languages

* move isSliceInt64Eq to util pkg; improve function names & typo

* use created & updated instead BeforeInsert & BeforeUpdate

* fix vendor checksum

* only show generated SQL when development mode

* remove extra update column updated_unix

* remove trace config

* Do not allow commiting to protected branch from online editor

* Add editor integration tests for adding new file and not allowing to add new file to protected branch

* remove unused vars

* remove unused comment

* Protected branches system

* Moved default branch to branches section (`:org/:reponame/settings/branches`).
* Initial support Protected Branch.
  - Admin does not restrict
  - Owner not to limit
  - To write permission restrictions

* reformat tmpl

* finished the UI and add/delete protected branch response

* remove unused comment

* indent all the template files and remove ru translations since we use crowdin

* fix the push bug