FEAT #13998 TIME 4 add recipient registered mail input

...n/registered-mail/indexing/recipient-input.component.html

...n/registered-mail/indexing/recipient-input.component.scss

...ion/registered-mail/indexing/recipient-input.component.ts

src/frontend/app/document-form.module.ts

src/frontend/app/indexation/indexation.component.ts

...app/indexation/indexing-form/indexing-form.component.html

...d/app/indexation/indexing-form/indexing-form.component.ts