FEAT #11275 TIME 2:15 front autocomplete contacts

src/frontend/app/app-common.module.ts

.../contact/autocomplete/contact-autocomplete.component.html

.../contact/autocomplete/contact-autocomplete.component.scss

...pp/contact/autocomplete/contact-autocomplete.component.ts

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

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

src/frontend/app/tag/indexing/tag-input.component.html

src/frontend/lang/lang-en.ts

src/frontend/lang/lang-fr.ts

src/frontend/lang/lang-nl.ts