refactor: migrate from ESLint to Biome and extract SQL queries to data.ts

- Replace ESLint with Biome for linting and formatting
- Configure Biome with tabs, double quotes, and organized imports
- Move all SQL/Drizzle queries from page.tsx files to data.ts files
- Create new data.ts files for: ajustes, dashboard, relatorios/categorias
- Update existing data.ts files: extrato, fatura (add lancamentos queries)
- Remove all drizzle-orm imports from page.tsx files
- Update README.md with new tooling info

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

components/auth/auth-header.tsx

@@ -1,15 +1,15 @@
 import { cn } from "@/lib/utils/ui";
 
 interface AuthHeaderProps {
-  title: string;
+	title: string;
 }
 
 export function AuthHeader({ title }: AuthHeaderProps) {
-  return (
-    <div className={cn("flex flex-col gap-1.5")}>
-      <h1 className="text-xl font-semibold tracking-tight text-card-foreground">
-        {title}
-      </h1>
-    </div>
-  );
+	return (
+		<div className={cn("flex flex-col gap-1.5")}>
+			<h1 className="text-xl font-semibold tracking-tight text-card-foreground">
+				{title}
+			</h1>
+		</div>
+	);
 }