FEAT #11454 TIME 4:30 add pinned folder

src/frontend/app/app.module.ts

...pp/folder/document-list/folder-document-list.component.ts

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

...end/app/folder/folder-pinned/folder-pinned.component.html

...end/app/folder/folder-pinned/folder-pinned.component.scss

...ntend/app/folder/folder-pinned/folder-pinned.component.ts

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

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

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

src/frontend/app/folder/folders.service.ts

src/frontend/app/folder/panel/panel-folder.component.html

src/frontend/app/folder/panel/panel-folder.component.scss

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

src/frontend/app/list/basket-list.component.ts

src/frontend/lang/lang-en.ts

src/frontend/lang/lang-fr.ts

src/frontend/lang/lang-nl.ts