feat: add UI component files and navigation structure

Added various UI components and navigation elements including:
- Section cards and selection components
- Social icon SVGs with horizontal/vertical text variants
- Table, tabs, and toggle components
- Site header and sidebar components
- Tooltip and unauthorized page
- Project configuration files (tsconfig.json)
- Route handlers for health checks
- Utility and hook functions for mobile responsiveness

app/loading.tsx

@@ -0,0 +1,41 @@
+import { Card, CardContent, CardFooter, CardHeader } from "@/components/ui/card"
+import { Skeleton } from "@/components/ui/skeleton"
+
+export default function Loading() {
+  return (
+    <div className="space-y-4 py-4">
+      <div className="flex items-center justify-between">
+        <Skeleton className="h-8 w-48" />
+        <Skeleton className="h-8 w-24" />
+      </div>
+
+      {/* Skeleton cards - repeat for multiple items */}
+      {Array(3)
+        .fill(0)
+        .map((_, index) => (
+          <Card key={index} className="mx-auto max-w-3xl">
+            <CardHeader className="gap-2">
+              <div className="flex items-center space-x-4">
+                <Skeleton className="h-12 w-12 rounded-full" />
+                <div className="space-y-2">
+                  <Skeleton className="h-4 w-32" />
+                  <Skeleton className="h-3 w-24" />
+                </div>
+              </div>
+            </CardHeader>
+            <CardContent className="space-y-2">
+              <Skeleton className="h-4 w-full" />
+              <Skeleton className="h-4 w-full" />
+              <Skeleton className="h-4 w-3/4" />
+            </CardContent>
+            <CardFooter>
+              <div className="flex w-full justify-between">
+                <Skeleton className="h-9 w-20" />
+                <Skeleton className="h-9 w-20" />
+              </div>
+            </CardFooter>
+          </Card>
+        ))}
+    </div>
+  )
+}