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/ui/skeleton.tsx

@@ -1,13 +1,13 @@
-import { cn } from "@/lib/utils/ui"
+import { cn } from "@/lib/utils/ui";
 
 function Skeleton({ className, ...props }: React.ComponentProps<"div">) {
-  return (
-    <div
-      data-slot="skeleton"
-      className={cn("bg-accent animate-pulse rounded-md", className)}
-      {...props}
-    />
-  )
+	return (
+		<div
+			data-slot="skeleton"
+			className={cn("bg-accent animate-pulse rounded-md", className)}
+			{...props}
+		/>
+	);
 }
 
-export { Skeleton }
+export { Skeleton };