[WIP] [FEATURE] including functionalities restore / delete to resource locator api and UI

including functionalities restore / delete to resource locator api and UI:

__Tasks:__

- [ ] test coverage
- [ ] gather feedback for my changes
- [ ] submit changes to the documentation
- [ ] adding buttons to ui
- [ ] add resource-locator repository
- [ ] add resource-locator controller
- [ ] adapt generate resource-locator to new api


__Informations:__

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| Tests pass?   | no => https://github.com/sulu-cmf/sulu/pull/110
| Fixed tickets | none
| Doc           | none