refactor: Remove sample code

frontend/src/components/example/HelloWorld.vue

frontend/src/components/example/TheWelcome.vue

frontend/src/components/example/WelcomeItem.vue

frontend/src/components/example/pelda-komponens.vue

frontend/src/components/icons/IconCommunity.vue

frontend/src/components/icons/IconDocumentation.vue

frontend/src/components/icons/IconEcosystem.vue

frontend/src/components/icons/IconSupport.vue

frontend/src/components/icons/IconTooling.vue