Make current code library + add docs

lib/components/nav/NavStack.vue

@@ -0,0 +1,26 @@
+<script setup>
+defineProps({})
+</script>
+
+<template>
+  <div class="omorphia__navstack">
+    <slot />
+  </div>
+</template>
+
+<style lang="scss" scoped>
+.omorphia__navstack {
+  display: flex;
+  flex-direction: column;
+
+  :deep(.omorphia__button) {
+    position: relative;
+    width: 100%;
+
+    &.selected {
+      background-color: var(--color-button-bg);
+      font-weight: bold;
+    }
+  }
+}
+</style>