feat: initial commit, setup build

.gitignore

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+build

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.10)
+project(node)
+
+add_executable(test
+    src/main.cpp
+)

build.sh

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+#!/usr/bin/env bash
+
+mkdir -p build
+cd build
+cmake -G Ninja ..
+ninja

src/main.cpp

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+#include <iostream>
+
+int main()
+{
+    std::cout << "hello world\n";
+}