Make current code library + add docs

lib/components/nav/NavItem.vue

@@ -0,0 +1,50 @@
+<script setup>
+import { Button } from '@/components'
+
+defineProps({
+  link: {
+    type: String,
+    default: null,
+  },
+  external: {
+    type: Boolean,
+    default: false,
+  },
+  action: {
+    type: Function,
+    default: null,
+  },
+  selected: {
+    type: Boolean,
+    default: false,
+  },
+  label: {
+    type: String,
+    required: true,
+  },
+  icon: {
+    type: String,
+    default: null,
+  },
+})
+</script>
+
+<template>
+  <Button
+    :link="link"
+    :external="external"
+    :action="action"
+    design="nav"
+    class="quiet-disabled"
+    :class="{
+      selected: selected,
+    }"
+    :disabled="selected"
+    :navlabel="label"
+  >
+    <slot />
+    {{ label }}
+  </Button>
+</template>
+
+<style lang="scss" scoped></style>