Add button states and use css vars for colors

.editorconfig

docs/.vitepress/config.ts

docs/components/button/index.md

docs/components/loader/index.md

src/components/button/Button.vue

src/components/button/style.scss

src/components/index.ts

src/components/loader/Loader.vue

src/components/loader/style.scss

src/composables/useType.ts

src/styles/colors.scss