feat: add custom icons to the website

This commit adds icons from various sources as a single font file to the website. Icons can be
inserted with the new Icon component.

content/.vuepress/client.ts

@@ -6,6 +6,7 @@ import GithubRepository from './components/GitHub/GithubRepository.vue';
 import ApiLoader from './components/ApiLoader.vue';
 import Loader from './components/Loader.vue';
 import Cache from './components/Cache.vue';
+import Icon from './components/Icon.vue';
 
 export default defineClientConfig({
   enhance({ app }) {
@@ -16,6 +17,7 @@ export default defineClientConfig({
     app.component('ApiLoader', ApiLoader);
     app.component('Loader', Loader);
     app.component('Cache', Cache);
+    app.component('Icon', Icon);
   },
   setup() {},
   layouts: {},