Add documentation site (#22)

Next.js 16 static docs site with:
- Overview, Getting Started, Tools, Sandboxes, and API Reference pages
- Responsive sidebar with scrollspy TOC and terminal logo
- Light/dark theme with next-themes
- Code blocks with syntax highlighting and copy button
- Package manager picker (npm/yarn/pnpm/bun)
- Favicon and OG image with terminal branding

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jbreite

docs/.gitignore

@@ -0,0 +1,4 @@
+.next
+node_modules
+out
+bun.lockb

docs/bun.lock

@@ -0,0 +1,6 @@
+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+import "./.next/dev/types/routes.d.ts";
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/app/api-reference/config/typescript for more information.

docs/next-env.d.ts

@@ -0,0 +1,6 @@
+/** @type {import('next').NextConfig} */
+const nextConfig = {
+  output: "export",
+};
+
+module.exports = nextConfig;

docs/next.config.js

@@ -0,0 +1,27 @@
+{
+  "name": "bashkit-docs",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev -p 3001",
+    "build": "next build",
+    "start": "next start -p 3001"
+  },
+  "dependencies": {
+    "@base-ui-components/react": "^1.0.0-rc.0",
+    "@pierre/diffs": "^1.0.10",
+    "framer-motion": "^12.28.1",
+    "next": "^16.1.6",
+    "next-themes": "^0.4.6",
+    "prism-react-renderer": "^2.4.1",
+    "react": "^19.1.0",
+    "react-dom": "^19.1.0"
+  },
+  "devDependencies": {
+    "@types/node": "^22.0.0",
+    "@types/react": "^19.1.0",
+    "@types/react-dom": "^19.1.0",
+    "sass": "^1.89.0",
+    "typescript": "^5.7.0"
+  }
+}

docs/package.json

@@ -0,0 +1,16 @@
+export function Footer() {
+  return (
+    <footer className="footer">
+      <p>
+        <a
+          href="https://github.com/jbreite/bashkit"
+          target="_blank"
+          rel="noopener noreferrer"
+        >
+          bashkit
+        </a>{" "}
+        &mdash; MIT License
+      </p>
+    </footer>
+  );
+}