FEAT #12091 TIME 2 diffusion model refactoring

...ffusionModel/diffusionModel-administration.component.html

...diffusionModel/diffusionModel-administration.component.ts

...fusionModel/diffusionModels-administration.component.html

...iffusionModel/diffusionModels-administration.component.ts

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

src/frontend/app/app.module.ts

src/frontend/app/avis/avis-workflow.component.ts

src/frontend/app/visa/visa-workflow.component.ts

src/frontend/lang/lang-en.ts

src/frontend/lang/lang-fr.ts

src/frontend/lang/lang-nl.ts