FEAT #11296 TIME 5:30 begin folder tree view

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

src/frontend/app/app.module.ts

src/frontend/app/basket/basket-home.component.html

src/frontend/app/basket/basket-home.component.scss

.../folder/document-list/folder-document-list.component.html

.../folder/document-list/folder-document-list.component.scss

...pp/folder/document-list/folder-document-list.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/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/home/home.component.html