This is a port of gogs/gogs#4398

The only changes made by myself are:

Add locales
Add some JS to the UI
Otherwise all code credit goes to @aboron

Resolves #10829

Signed-off-by: jolheiser <john.olheiser@gmail.com>
Co-authored-by: zeripath <art27@cantab.net>

* Add placeholder text
  * Localize

* Add a migrat service type switch page

* Improve translations

* remove images

* Fix images

* remove extra create repo button on dashboard

* Follow reviewers' opinions

* Fix frontend lint

* Remove wrong submit file

* Fix tests

* Adjust the size of image

* Apply suggestions from code review

Co-authored-by: 赵智超 <1012112796@qq.com>

* Remove username and password from migration of github/gitlab

* Improve docs

* Improve interface docs

Co-authored-by: 赵智超 <1012112796@qq.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

* Implement pwn

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Update module

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Apply suggestions mrsdizzie

Co-authored-by: mrsdizzie <info@mrsdizzie.com>

* Add link to HIBP

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Add more details to admin command

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Add context to pwn

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Consistency and making some noise ;)

Signed-off-by: jolheiser <john.olheiser@gmail.com>

Co-authored-by: mrsdizzie <info@mrsdizzie.com>
Co-authored-by: zeripath <art27@cantab.net>

* Add field with isIssueWriter to front end

* Make branch field editable

* Switch frontend to form and POST from javascript

* Add /issue/id/ref endpoint to routes

* Use UpdateIssueTitle model to change ref in backend

* Removed crossreference check and adding comments on branch change

* Use ref returned from POST to update the field

* Prevent calling loadRepo from models/

* Branch/tag refreshed without page reload

* Remove filter for empty branch name

* Add clear option to tag list as well

* Delete button translation and coloring

* Fix for not showing selected branch name in new issue

* Check that branch is not being changed on a PR

* Change logic

* Notification when changing issue ref

* Fix for renamed permission parameter

* Fix for failing build

* Apply suggestions from code review

Co-authored-by: zeripath <art27@cantab.net>

Co-authored-by: Gitea <gitea@fake.local>
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

editor.commit_empty_file_text should read `about to commit`
not `about commit`

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

* Add Created and Updated to Milestone table and expose via API

* Expose to UI - To Overloaded ?!?

* fix unit test

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

* Add make targed generate-license & generate-gitignore

* Update Gitignores & Licenses

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Initial work

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Implementation

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Fix gitlab and token cloning

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Imports and JS

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Fix test

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Linting

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Generate swagger

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Move mirror toggle and rename options

Signed-off-by: jolheiser <john.olheiser@gmail.com>

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

* Add link to home page on swagger ui

Signed-off-by: a1012112796 <1012112796@qq.com>

* translate

* Apply review suggestion

* Move to right, Thanks @silverwind

* tweaks

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>