Add Nix shell (#5362)

shell.nix

@@ -0,0 +1,26 @@
+{ pkgs ? import <nixpkgs> {} }:
+  pkgs.mkShell {    
+    nativeBuildInputs = with pkgs.buildPackages; [
+      # Build tools
+      cmake
+      cmake-format
+      bash
+      curl
+      git
+      qtcreator
+
+      # Debug / Test 
+      valgrind
+      gdb
+
+      # Compiler
+      gcc
+
+      # Libraries
+      openssl
+      protobuf
+      qt6.qtbase
+      qt6.full
+      qt6.wrapQtAppsHook
+    ];
+  }