feat: add license files for JavaScript assets and implement DocItem component

- Added LICENSE.txt file for JavaScript assets in the build directory, including licenses for NProgress and React libraries.
- Introduced a new runtime JavaScript file for handling module loading.
- Created a new DocItem component to manage document rendering and metadata handling in the Docusaurus theme.
- Implemented tests for the docs proxy server to ensure proper routing to the configured docsPort.

ccw/tests/docs-proxy-port.test.js

@@ -0,0 +1,74 @@
+/**
+ * Docs proxy (dashboard server) - configured docsPort plumbing
+ *
+ * Runs against the shipped runtime in `ccw/dist`.
+ */
+
+import { afterEach, describe, it, mock } from 'node:test';
+import assert from 'node:assert/strict';
+import http from 'node:http';
+import { mkdtempSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+
+const ORIGINAL_ENV = { ...process.env };
+
+const serverUrl = new URL('../dist/core/server.js', import.meta.url);
+serverUrl.searchParams.set('t', String(Date.now()));
+
+function httpGetText(url) {
+  return new Promise((resolve, reject) => {
+    const req = http.get(url, (res) => {
+      let data = '';
+      res.setEncoding('utf8');
+      res.on('data', (chunk) => (data += chunk));
+      res.on('end', () => resolve({ statusCode: res.statusCode ?? 0, body: data }));
+    });
+    req.on('error', reject);
+  });
+}
+
+describe('docs proxy port', () => {
+  afterEach(() => {
+    mock.restoreAll();
+    process.env = ORIGINAL_ENV;
+  });
+
+  it('proxies /docs/* to the configured docsPort', async () => {
+    const ccwHome = mkdtempSync(join(tmpdir(), 'ccw-docs-proxy-home-'));
+    process.env = { ...ORIGINAL_ENV, CCW_DATA_DIR: ccwHome, CCW_DISABLE_WARMUP: '1' };
+
+    const serverMod = await import(serverUrl.href);
+
+    let proxiedToUrl = null;
+    mock.method(globalThis, 'fetch', async (url) => {
+      proxiedToUrl = String(url);
+      return new Response('ok', {
+        status: 200,
+        headers: { 'content-type': 'text/plain; charset=utf-8' },
+      });
+    });
+
+    const server = await serverMod.startServer({
+      port: 0,
+      initialPath: process.cwd(),
+      frontend: 'react',
+      reactPort: 65530,
+      docsPort: 39999,
+    });
+
+    try {
+      const addr = server.address();
+      assert.equal(typeof addr, 'object');
+      assert.ok(addr);
+
+      const { statusCode, body } = await httpGetText(`http://127.0.0.1:${addr.port}/docs/zh/`);
+      assert.equal(statusCode, 200);
+      assert.equal(body, 'ok');
+      assert.equal(proxiedToUrl, 'http://localhost:39999/docs/zh/');
+    } finally {
+      await new Promise((resolve) => server.close(resolve));
+      rmSync(ccwHome, { recursive: true, force: true });
+    }
+  });
+});