chore: remove deprecated files and configurations

- Deleted .gitignore, biome.json, next.config.ts, package.json, pnpm-lock.yaml, pnpm-workspace.yaml, postcss.config.mjs, README.md, and various API, component, and utility files to clean up the codebase.
- Removed unused database files and migration scripts to streamline the project structure.
- Eliminated obsolete hooks and services to enhance maintainability and reduce clutter.

components/theme-provider.tsx

@@ -1,20 +0,0 @@
-"use client";
-
-import * as React from "react";
-import { ThemeProvider as NextThemesProvider } from "next-themes";
-
-export function ThemeProvider({
-  children,
-  ...props
-}: React.ComponentProps<typeof NextThemesProvider>) {
-  return (
-    <NextThemesProvider
-      attribute="class"
-      defaultTheme="system"
-      enableSystem
-      {...props}
-    >
-      {children}
-    </NextThemesProvider>
-  );
-}