feat(nextjs): Add package for nextjs plugin

.changeset/ninety-glasses-retire.md

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+---
+'@wyw-in-js/webpack-loader': patch
+---
+
+Allow a way for Next.js to hook into the loader

.changeset/odd-paws-try.md

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+---
+'@wyw-in-js/nextjs': patch
+---
+
+Add official Next.js integration for WyW-in-JS

examples/nextjs-demo/.eslintrc.json

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+{
+  "extends": "next/core-web-vitals"
+}

examples/nextjs-demo/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+.yarn/install-state.gz
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

examples/nextjs-demo/README.md

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+This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
+
+## Getting Started
+
+First, run the development server:
+
+```bash
+npm run dev
+# or
+yarn dev
+# or
+pnpm dev
+# or
+bun dev
+```
+
+Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+
+You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+
+This project uses [`next/font`](https://nextjs.org/docs/basic-features/font-optimization) to automatically optimize and load Inter, a custom Google Font.
+
+## Learn More
+
+To learn more about Next.js, take a look at the following resources:
+
+- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
+- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+
+You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js/) - your feedback and contributions are welcome!
+
+## Deploy on Vercel
+
+The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
+
+Check out our [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details.

examples/nextjs-demo/next.config.js

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+import withWywInJs from '@wyw-in-js/nextjs';
+
+/** @type {import('next').NextConfig} */
+const nextConfig = {};
+
+export default withWywInJs(nextConfig, {
+  sourceMap: true,
+  displayName: true,
+});

examples/nextjs-demo/package.json

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+{
+  "name": "@wyw-in-js/nextjs-demo",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "@linaria/core": "^6.2.0",
+    "next": "14.2.3",
+    "react": "^18",
+    "react-dom": "^18"
+  },
+  "devDependencies": {
+    "@types/node": "^20",
+    "@types/react": "^18",
+    "@types/react-dom": "^18",
+    "@wyw-in-js/nextjs": "workspace:*",
+    "eslint-config-next": "14.2.3",
+    "typescript": "^5"
+  }
+}

examples/nextjs-demo/src/app/layout.tsx

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+import type { Metadata } from 'next';
+import { css } from '@linaria/core';
+import { Inter } from 'next/font/google';
+
+css`
+  :global() {
+    :root {
+      --max-width: 1100px;
+      --border-radius: 12px;
+      --font-mono: ui-monospace, Menlo, Monaco, 'Cascadia Mono', 'Segoe UI Mono',
+        'Roboto Mono', 'Oxygen Mono', 'Ubuntu Monospace', 'Source Code Pro',
+        'Fira Mono', 'Droid Sans Mono', 'Courier New', monospace;
+
+      --foreground-rgb: 0, 0, 0;
+      --background-start-rgb: 214, 219, 220;
+      --background-end-rgb: 255, 255, 255;
+
+      --primary-glow: conic-gradient(
+        from 180deg at 50% 50%,
+        #16abff33 0deg,
+        #0885ff33 55deg,
+        #54d6ff33 120deg,
+        #0071ff33 160deg,
+        transparent 360deg
+      );
+      --secondary-glow: radial-gradient(
+        rgba(255, 255, 255, 1),
+        rgba(255, 255, 255, 0)
+      );
+
+      --tile-start-rgb: 239, 245, 249;
+      --tile-end-rgb: 228, 232, 233;
+      --tile-border: conic-gradient(
+        #00000080,
+        #00000040,
+        #00000030,
+        #00000020,
+        #00000010,
+        #00000010,
+        #00000080
+      );
+
+      --callout-rgb: 238, 240, 241;
+      --callout-border-rgb: 172, 175, 176;
+      --card-rgb: 180, 185, 188;
+      --card-border-rgb: 131, 134, 135;
+    }
+
+    @media (prefers-color-scheme: dark) {
+      :root {
+        --foreground-rgb: 255, 255, 255;
+        --background-start-rgb: 0, 0, 0;
+        --background-end-rgb: 0, 0, 0;
+
+        --primary-glow: radial-gradient(
+          rgba(1, 65, 255, 0.4),
+          rgba(1, 65, 255, 0)
+        );
+        --secondary-glow: linear-gradient(
+          to bottom right,
+          rgba(1, 65, 255, 0),
+          rgba(1, 65, 255, 0),
+          rgba(1, 65, 255, 0.3)
+        );
+
+        --tile-start-rgb: 2, 13, 46;
+        --tile-end-rgb: 2, 5, 19;
+        --tile-border: conic-gradient(
+          #ffffff80,
+          #ffffff40,
+          #ffffff30,
+          #ffffff20,
+          #ffffff10,
+          #ffffff10,
+          #ffffff80
+        );
+
+        --callout-rgb: 20, 20, 20;
+        --callout-border-rgb: 108, 108, 108;
+        --card-rgb: 100, 100, 100;
+        --card-border-rgb: 200, 200, 200;
+      }
+    }
+
+    * {
+      box-sizing: border-box;
+      padding: 0;
+      margin: 0;
+    }
+
+    html,
+    body {
+      max-width: 100vw;
+      overflow-x: hidden;
+    }
+
+    body {
+      color: rgb(var(--foreground-rgb));
+      background: linear-gradient(
+          to bottom,
+          transparent,
+          rgb(var(--background-end-rgb))
+        )
+        rgb(var(--background-start-rgb));
+    }
+
+    a {
+      color: inherit;
+      text-decoration: none;
+    }
+
+    @media (prefers-color-scheme: dark) {
+      html {
+        color-scheme: dark;
+      }
+    }
+  }
+`;
+
+const inter = Inter({ subsets: ['latin'] });
+
+export const metadata: Metadata = {
+  title: 'Create Next App',
+  description: 'Generated by create next app',
+};
+
+export default function RootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return (
+    <html lang="en">
+      <body className={inter.className}>{children}</body>
+    </html>
+  );
+}