add Photon to Kitchensink / Framework

Author: lihuiba

README.md

@@ -135,6 +135,7 @@ libraries with novel use of new C++ features.
 * [abseil](https://abseil.io/) - Abseil is an open-source collection of C++ code (compliant to C++11) designed to augment the C++ standard library.
 * [Boost](https://www.boost.org/) - Collection of C++ libraries.
 * [Folly](https://github.com/facebook/folly) - Facebook Open-source Library.
+* [PhotonLibOS](https://photonlibos.github.io/) - A comprehensive C++ framework featuring efficient user-space threading (coroutine with work-stealing), I/O, networking, RPC, HTTP, etc., and used extensively in Alibaba. It is compatible with C++ 14/17/20/23, Linux, MacOS, x86-64, ARM64, gcc and clang.
 * [POCO](https://pocoproject.org/) - The POCO C++ Libraries are powerful cross-platform C++ libraries for building network- and internet-based applications that run on desktop, server, mobile, IoT, and embedded systems.
 * [nonstd-lite](https://github.com/martinmoene/nonstd-lite) - Parent of *-lite repositories, a migration path to post-C++11 features for pre-C++11 environments.
 * [xtd](https://github.com/gammasoft71/xtd) - Modern C++17/20 framework to create console (CLI), forms (GUI like WinForms) and tunit (unit tests like Microsoft Unit Testing Framework) applications on Windows, macOS, Linux, iOS and android.