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.

app/page.tsx

@@ -1,21 +0,0 @@
-import { ModeToggle } from "@/components/mode-toggle";
-import { ChatContainer } from "@/components/chat/ChatContainer";
-import { ClientHome } from "@/components/ClientHome";
-
-async function fetchModels() {
-  try {
-    const baseUrl = process.env.NEXT_PUBLIC_BASE_URL || "http://localhost:3000";
-    const res = await fetch(`${baseUrl}/api/ollama/models`, {
-      cache: "no-store",
-    });
-    if (!res.ok) return { offline: true, models: [] };
-    return res.json();
-  } catch {
-    return { offline: true, models: [] };
-  }
-}
-
-export default async function Home() {
-  const { offline, models } = await fetchModels();
-  return <ClientHome offline={offline} models={models} />;
-}