FEAT #11271 TIME 1:30 add idnexing form contols

...ndexingModel/indexing-model-administration.component.html

src/frontend/app/indexation/indexation.component.html

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

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

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

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