chore: build with cmake

.gitignore

@@ -0,0 +1 @@
+build/

CMakeLists.txt

@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.27)
+
+project(HelloWorld)
+
+add_executable(${PROJECT_NAME} hello.cpp)

hello.cpp

@@ -1,3 +1,14 @@
+// To compile on Windows
+
+// Install CMake
+// https://cmake.org/download
+// Add to PATH for all users
+// from project root:
+// mkdir build
+// cd build
+// cmake ..
+// cmake --build .
+
 #include <iostream>
 
 int main()