feat: Add loading skeletons for improved UX

- Implement loading states for dashboard, project, and video views
- Introduce skeleton UIs for settings pages
- Add skeletons for Navbar and charts
- Enhance `Skeleton` component with a text variant
- Improve perceived performance during data fetching
- Update `.gitignore` with `Optimization.md`

app/(dashboard)/dashboard/loading.tsx

@@ -0,0 +1,48 @@
+import { Skeleton } from "@/components/ui/skeleton"
+import { Card, CardHeader, CardContent } from "@/components/ui/card"
+
+function ProjectCardSkeleton() {
+  return (
+    <Card className="h-full">
+      <CardHeader>
+        <div className="flex items-start justify-between">
+          <div className="flex items-center gap-2">
+            <Skeleton className="h-5 w-5 rounded" />
+            <Skeleton className="h-5 w-32" />
+          </div>
+          <Skeleton className="h-5 w-16 rounded-full" />
+        </div>
+        <Skeleton className="h-4 w-20 rounded-full mt-1" />
+        <Skeleton className="h-4 w-full mt-1" />
+        <Skeleton className="h-4 w-2/3" />
+      </CardHeader>
+      <CardContent>
+        <div className="flex items-center gap-4">
+          <Skeleton className="h-4 w-14" />
+          <Skeleton className="h-4 w-8" />
+          <Skeleton className="h-4 w-16" />
+        </div>
+      </CardContent>
+    </Card>
+  )
+}
+
+export default function DashboardLoading() {
+  return (
+    <div className="px-6 lg:px-8 py-8 w-full">
+      <div className="flex items-center justify-between mb-8">
+        <div className="flex items-center gap-4">
+          <Skeleton className="h-9 w-40" />
+          <Skeleton className="h-9 w-[200px] rounded-md" />
+        </div>
+        <Skeleton className="h-9 w-32 rounded-md" />
+      </div>
+
+      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
+        {Array.from({ length: 6 }).map((_, i) => (
+          <ProjectCardSkeleton key={i} />
+        ))}
+      </div>
+    </div>
+  )
+}