GF-4 (#4) Start work on main layout

app/components/ui/sidebar/SidebarInset.vue

@@ -0,0 +1,23 @@
+<script setup lang="ts">
+import type { HTMLAttributes } from "vue";
+import { cn } from "@/lib/utils";
+
+const props = defineProps<{
+  class?: HTMLAttributes["class"];
+}>();
+</script>
+
+<template>
+  <main
+    data-slot="sidebar-inset"
+    :class="
+      cn(
+        'bg-background relative flex w-full flex-1 flex-col',
+        'md:peer-data-[variant=inset]:m-2 md:peer-data-[variant=inset]:ml-0 md:peer-data-[variant=inset]:rounded-xl md:peer-data-[variant=inset]:shadow-sm md:peer-data-[variant=inset]:peer-data-[state=collapsed]:ml-2',
+        props.class
+      )
+    "
+  >
+    <slot />
+  </main>
+</template>