docs: update tailwind.config.ts to use satisfies operator

[JamBalaya56562]

What?

Use satisfies operator for reference tailwindcss configuration.

Why?

1. To refer to tailwind extended type.

use satisfies operator instead of type in tailwind.config.ts

Tailwind provides a resolveConfig helper you can use to generate a fully merged version of your configuration object:

// type.ts
import type resolveConfig from "tailwindcss/resolveConfig";
import type config from "./tailwind.config";

type ResolveConfig = ReturnType<typeof resolveConfig<typeof config>>;

type ResolveConfigTheme = ResolveConfig["theme"];

type Color = keyof ResolveConfigTheme["colors"];
// type Color = "primary" | "secondary" | "tertiary" | keyof DefaultColors
// --- DefaultColors contain ... ---
// type Color = "primary" | "secondary" | "tertiary" | "inherit" | "current" |
//              "transparent" | "black" | "white" | "slate" | "gray" | "zinc" | 
//              "neutral" | "stone" | "red" | "orange" | ... 20 more

type FontSize = keyof ResolveConfigTheme["fontSize"];
// type FontSize = "xs" | "sm" | "base" | "lg" | "xl" | "2xl" | "3xl" | 
//                 "4xl" | "5xl" | "6xl" | "7xl" | "8xl" | "9xl"

type ZIndex = keyof ResolveConfigTheme["zIndex"];
// type ZIndex = "0" | "10" | "20" | "30" | "40" | "50" | "auto"

However, the type information cannot be successfully obtained by using Config types.

// tailwind.config.ts
import type { Config } from "tailwindcss";

// ❌ can't get type info
const config: Config = {
// ...
};

// ✔️ can get type info
const config = {
// ...
} satisfies Config;

export default config

That's why I introduced satisfies operator.
In addition, official tailwind configuration uses satisfies operator.

// tailwind.config.ts
import type { Config } from 'tailwindcss'

export default {
  content: [],
  theme: {
    extend: {},
  },
  plugins: [],
} satisfies Config

Improving Documentation

• Run pnpm prettier-fix to fix formatting issues before opening the PR.
• Read the Docs Contribution Guide to ensure your contribution follows the docs guidelines: https://nextjs.org/docs/community/contribution-guide

[ijjk]

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