Update styling, new version 1.2.4

core/build.gradle.kts

core/package-lock.json

core/package.json

core/src/scss/0_settings/_colours.scss

core/src/scss/5_components/_banner.scss

core/src/scss/5_components/_chip.scss

core/src/scss/5_components/_search.scss

core/src/scss/5_components/_sidebar.scss

core/src/scss/5_components/_toast.scss

documentation/package-lock.json

documentation/package.json

documentation/src/app.html

documentation/src/routes/+layout.svelte

documentation/src/routes/components/+layout.svelte