fix: 修复TypeScript配置错误并更新项目文档

详细说明:
- 修复了@n8n/config包的TypeScript配置错误
- 移除了不存在的jest-expect-message类型引用
- 清理了所有TypeScript构建缓存
- 更新了可行性分析文档，添加了技术实施方案
- 更新了Agent prompt文档
- 添加了会展策划工作流文档
- 包含了n8n-chinese-translation子项目
- 添加了exhibition-demo展示系统框架

n8n-n8n-1.109.2/packages/@n8n/nodes-langchain/utils/httpProxyAgent 2.ts

@@ -0,0 +1,19 @@
+import proxyFromEnv from 'proxy-from-env';
+import { ProxyAgent } from 'undici';
+
+/**
+ * Returns a ProxyAgent or undefined based on the environment variables and target URL.
+ * When target URL is not provided, NO_PROXY environment variable is not respected.
+ */
+export function getProxyAgent(targetUrl?: string) {
+	// There are cases where we don't know the target URL in advance (e.g. when we need to provide a proxy agent to ChatAwsBedrock)
+	// In such case we use a dummy URL.
+	// This will lead to `NO_PROXY` environment variable not being respected, but it is better than not having a proxy agent at all.
+	const proxyUrl = proxyFromEnv.getProxyForUrl(targetUrl ?? 'https://example.nonexistent/');
+
+	if (!proxyUrl) {
+		return undefined;
+	}
+
+	return new ProxyAgent(proxyUrl);
+}