FEAT #11271 TIME 4 add autocomplete manage route

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

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

src/frontend/lang/lang-en.ts

src/frontend/lang/lang-fr.ts

src/frontend/lang/lang-nl.ts

...frontend/plugins/autocomplete/autocomplete.component.html

...frontend/plugins/autocomplete/autocomplete.component.scss

src/frontend/plugins/autocomplete/autocomplete.component.ts