* feat(repo): support search repository by topic name

The backend SearchRepositoryByName function supports several sort order
options, hook these up to the /repos/search API.

New parameters for /repos/search:
    'sort':  alpha, created, updated, size, or id
    'order': asc or desc

'sort' defaults to alpha.
'order' defaults to ascending, and is ignored if 'sort' is not specified.
The overall default behavior is unchanged (alphabetically ascending).

This partially implements issue #3963

Signed-off-by: Allen Wild <allenwild93@gmail.com>

* Repositories can only migrated to own user or organizations

* Add check for organization that user does not belong to

* Allow admin to migrate repositories for other users

Fix all the resting errors to have a valid swagger file.

They are still some warnings but nothing blocking.

Doing so I found that some request still misses son parameters for some POST/PUT/PATCH request. This means the a client generated from the swagger file will not work completely. 

Fix #4088 by activating validation in drone
Should fix #4010.

* add topic models and unit tests

* fix comments

* fix comment

* add the UI to show or add topics for a repo

* show topics on repositories list

* fix test

* don't show manage topics link when no permission

* use green basic as topic label

* fix topic label color

* remove trace content

* remove debug function

* Replace all ctx.Handle with ctx.ServerError or ctx.NotFound

* Change Handle(403) to NotFound, avoid using macaron's NotFound

* Update swagger documentation

Add docs for missing endpoints
Add documentation for request parameters
Make parameter naming consistent
Fix response documentation

* Restore delete comments

* Add repo type option to /api/repo/search

* Add tests and fix result of collaborative filter in specific condition

* Fix/optimize search & tests

* Improve integration tests

* Fix lint errors

* Fix unit tests

* Change and improve internal implementation of repo search

* Use NonexistentID

* Make search api more general

* Change mirror and fork search behaviour

* Fix tests & typo in comment

* Fix and remove FIXME

* Respect membership visibility

* Fix/rewrite searchRepositoryByName function

* Add unit tests

* Add integration tests

* Remove Searcher completely

* Remove trailing space

* Webhooks for repo creation/deletion

* add createHookTask

* Add handles for GetSlackPayload and GetDiscordPayload

* Add collaborative repositories to the dashboard

Remove some unused code from the Dashboard func

* fix some bug and some refactor

* fix tests

* Add swagger comment for adminCreateOrg

* Add swagger comment for admin route

* add hook swagger doc

* Add tags

* Add auth

* Fix name of responses

* Edit name method

* Update vendor

* make generate-swagger

* Fix and improve dashboard repo UI

* Change order of scripts loading

* Remove "mirror" tab

* Remove single tab panel for "org user"

* Add localization strings

* Create vue component and change event for search

* Add "mirrors" filter

* Check for access in /repositories/:id

* Integration test

Don't require token when not necessary

* Improve ErrOrgNotExist type
Return new error type
Use good error check
Use new method to check error
Update tests

* Fix unchanged method name report

* Add swagger comment for MirrorSync

* Generate swagger.v1.json

There was a panic when there's no logged in user

- Generate swagger.json into public/
- Add swagger-ui auto-installation
- Add footer link to local swagger-ui
- Add /swagger url for using app url.
- Fix Swagger-UI version via git tag

* API: Add repo mirror sync

* Correct error message

* Change http status to 200

clean up

fix arguments

remove repeated token

give admins listing rights

Also move duplicated code into repo.APIFormat(..)

From code.gitea.io/go-sdk/gitea
  To code.gitea.io/sdk/gitea

- Update import paths from github.com/go-gitea to code.gitea.io
- Fix import path for travis

See https://docs.travis-ci.com/user/languages/go#Go-Import-Path