This should make it easier to find icons, as they can now be included
directly as component:

<icon-... />

Icons can be found on: icon-sets.iconify.design

Example:
Icon at https://icon-sets.iconify.design/ph/trash/ can be used with the
following component:

<icon-ph-trash />

closes #124

Sometimes it’s helpful to see which dependencies are pulled in, what’s
pulling them in and what impact they have on the bundle size.
rollup-plugin-visualizer does exactly that.

Notable changes:
 * Vue 2.6 to Vue 3 + compat migration.
 * Build system migration from vue-cli/webpack to Vite.
 * Application dependencies like bootstrap-vue, vue-router, vuex,
   or vue-toast-nofitication have been updated, if doing so was
   necessary or advisable for the Vue 3 migration.
 * Static file includes for the oidc-client in oidc_callback.html
   and oidc_callback_silentRenew.html have been removed in favor
   of automatic processing in the build system so that all assets
   are versioned and invalid cache hits are prevented.

Fixes #53 and #110.