Add VSCode configuration files for debugging and building with CMake; refactor main.cpp to clean up includes

day4/main.cpp

@@ -1,18 +1,12 @@
-#include <algorithm>
 #include <array>
 #include <cstddef>
 #include <expected>
 #include <fstream>
-#include <functional>
 #include <iostream>
-#include <iterator>
-#include <map>
 #include <mdspan>
-#include <numeric>
 #include <print>
 #include <ranges>
 #include <string>
-#include <string_view>
 #include <vector>
 
 struct Diagram {
@@ -25,6 +19,7 @@ struct Diagram {
     auto grid() { return GridView(data.data(), height, width); }
 };
 
+namespace {
 auto printMap(Diagram &diagram) {
     auto grid = diagram.grid();
     for (auto row = 0UZ; row != grid.extent(0); row++) {
@@ -37,7 +32,6 @@ auto printMap(Diagram &diagram) {
     std::println("Width: {}", diagram.width);
     std::println("Height: {}", diagram.height);
 }
-
 auto parseMap(const std::string &filename) -> std::expected<Diagram, std::string> {
     std::ifstream inputF{filename};
 
@@ -143,7 +137,7 @@ auto moveMoveablePaper(Diagram &diagram) -> long {
 
     return totalPaperRemoved;
 }
-
+} // namespace
 auto main() -> int {
     auto testCase = parseMap("test_input");
     if (testCase) {