🎉 init(cmake): init modern cmake template

apps/CMakeLists.txt

@@ -0,0 +1,4 @@
+add_executable(app app.cpp)
+target_compile_features(app PRIVATE cxx_std_17)
+
+target_link_libraries(app PRIVATE modern_library fmt::fmt)

apps/app.cpp

@@ -0,0 +1,17 @@
+#include <modern/lib.hpp>
+
+#include <fmt/format.h>
+
+#include <iostream>
+#include <vector>
+#include <tuple>
+
+int main() {
+    std::vector<double> input = {1.2, 2.3, 3.4, 4.5};
+
+    auto [mean, moment] = accumulate_vector(input);
+
+    fmt::print("Mean: {}, Moment: {}\n",  mean, moment);
+
+    return 0;
+}