FEAT #12619 TIME 0:35 create folder modal

...lder/folder-create-modal/folder-create-modal.component.ts

...rontend/app/folder/folder-menu/folder-menu.component.html

...rontend/app/folder/folder-menu/folder-menu.component.scss

src/frontend/app/folder/folder-menu/folder-menu.component.ts

src/frontend/app/folder/folder-tree.component.ts

src/frontend/lang/lang-en.ts

src/frontend/lang/lang-fr.ts

src/frontend/lang/lang-nl.ts