feat: 初始化 kdbx-viewer 项目

实现服务端解密的 KeePass 网页查看器，包含登录门户口令与验证码、RSA+会话级 AES 加密通道、审计日志持久化、HTTPS 自动证书、Docker 部署配置及端到端测试。

cookies.txt

@@ -0,0 +1,5 @@
+# Netscape HTTP Cookie File
+# https://curl.se/docs/http-cookies.html
+# This file was generated by libcurl! Edit at your own risk.
+
+#HttpOnly_localhost	FALSE	/	FALSE	1787641321	connect.sid	s%3AfBKm87832kFzpe3ZmaWAwTQvjYHH1wmJ.vMLDtEh5K7PNZYd9X8whkZavcnoQk7D6PKsX%2Fz0wuHY