build: switch from yarn to npm to manage js dependencies and move js contents to root

yarn v1 is being deprecated and starts to have some issues

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

src/components/About/InstanceContactLink.story.vue

@@ -0,0 +1,20 @@
+<template>
+  <Story>
+    <Variant title="empty">
+      <InstanceContactLink />
+    </Variant>
+    <Variant title="string">
+      <InstanceContactLink contact="someone" />
+    </Variant>
+    <Variant title="email">
+      <InstanceContactLink contact="someone@somewhere.tld" />
+    </Variant>
+    <Variant title="url">
+      <InstanceContactLink contact="https://somewhere.com" />
+    </Variant>
+  </Story>
+</template>
+
+<script lang="ts" setup>
+import InstanceContactLink from "./InstanceContactLink.vue";
+</script>