Issue #3106600 by bnjmnm, lauriii: Decouple Classy libraries from Umami

...umami/themes/umami/css/classy/components/action-links.css

...mi/themes/umami/css/classy/components/book-navigation.css

...o_umami/themes/umami/css/classy/components/breadcrumb.css

.../demo_umami/themes/umami/css/classy/components/button.css

...themes/umami/css/classy/components/collapse-processed.css

...i/themes/umami/css/classy/components/container-inline.css

...demo_umami/themes/umami/css/classy/components/details.css

.../demo_umami/themes/umami/css/classy/components/dialog.css

...mi/themes/umami/css/classy/components/exposed-filters.css

...s/demo_umami/themes/umami/css/classy/components/field.css

...es/demo_umami/themes/umami/css/classy/components/file.css

...es/demo_umami/themes/umami/css/classy/components/form.css

...s/demo_umami/themes/umami/css/classy/components/forum.css

...s/demo_umami/themes/umami/css/classy/components/icons.css

...umami/themes/umami/css/classy/components/image-widget.css

..._umami/themes/umami/css/classy/components/inline-form.css

...mo_umami/themes/umami/css/classy/components/item-list.css

...es/demo_umami/themes/umami/css/classy/components/link.css

...s/demo_umami/themes/umami/css/classy/components/links.css

.../themes/umami/css/classy/components/media-embed-error.css