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/theme-provider.tsx

@@ -1,11 +1,11 @@
 "use client";
 
 import { ThemeProvider as NextThemesProvider } from "next-themes";
-import * as React from "react";
+import type * as React from "react";
 
 export function ThemeProvider({
-  children,
-  ...props
+	children,
+	...props
 }: React.ComponentProps<typeof NextThemesProvider>) {
-  return <NextThemesProvider {...props}>{children}</NextThemesProvider>;
+	return <NextThemesProvider {...props}>{children}</NextThemesProvider>;
 }