Add some quality of life changes

docs/components/card/playlist.md

src/components/button/Button.vue

src/components/button/play/style.scss

src/components/input/Input.vue

src/components/input/style.scss

src/components/loader/style.scss

src/components/pagination/Pagination.vue

src/components/pill/Pill.vue

src/components/popover/style.scss

src/components/textarea/Textarea.vue

src/styles/colors.scss