Add video feed feature with related components and hooks

- Implemented VideoFeed component to display sightings.
- Created useSightingList and useVideoFeed hooks for data fetching and state management.
- Added AppProviders for context management.
- Updated Dashboard to include VideoFeed.
- Introduced types for sightings in utils/types.tsx.
- Added Header and Footer components for layout.
- Configured React Query for data handling.

src/app/providers/QueryProvider.tsx

@@ -0,0 +1,7 @@
+import type { PropsWithChildren } from "react";
+import { QueryClientProvider } from "@tanstack/react-query";
+import { queryClient } from "../queryClient";
+
+export function QueryProvider({ children }: PropsWithChildren) {
+  return <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>;
+}