Add Networking from Scratch to C/C++ Network programming (#864)

Applied manually from PR #864 using the repo's plain [Title](link)
format.

Co-authored-by: Tanay10x <Tanay10x@users.noreply.github.com>
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: 3 people

README.md

@@ -132,6 +132,7 @@ To get started, simply fork this repo. Please refer to [CONTRIBUTING.md](CONTRIB
   - [Part 5 - Topic abstraction](https://codepr.github.io/posts/sol-mqtt-broker-p5)
   - [Part 6 - Handlers](https://codepr.github.io/posts/sol-mqtt-broker-p6)
   - [Bonus - Multithreading](https://codepr.github.io/posts/sol-mqtt-broker-bonus)
+- [Networking from Scratch](https://github.com/TanayK07/networking-from-scratch)
 
 ### OpenGL: