feat(Standard-Compositions): Imported standard metal fractions from MESA

Imported standard metal fractions from MESA to build compositions from one of the standard schemes

tests/composition/sandbox/sandbox.cpp

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+#include "fourdst/composition/io/standard_compositions.h"
+#include "fourdst/composition/io/StandardAbundancesBinary.h"
+
+#include "fourdst/composition/composition.h"
+#include "fourdst/atomic/atomicSpecies.h"
+#include "fourdst/atomic/species.h"
+#include "fourdst/composition/utils.h"
+
+#include <string>
+#include <vector>
+#include <algorithm>
+#include <fstream>
+#include <numeric>
+#include <stdexcept>
+#include <unordered_map>
+#include <print>
+#include <ranges>
+
+int main(int argc, char** argv) {
+
+
+    // @input: initial_z, initial_y, metal_fraction_scheme & isotopic_percentage_scheme
+    // Options for metal_frac_scheme: ['AG89', 'GN93', 'GS98', 'L03', 'AGS05', 'AGSS09', 'A09_Przybilla', 'MB22_photospheric', 'AAG21_photospheric', 'L09']
+    // Options for isotopic percentage scheme: [L03_data, L09_data]
+
+    
+    // CLI::App app("Loading Z fractions");
+
+    // fourdst::config::Config<Options> config;
+    // fourdst::config::register_as_cli(config, app);
+    // app.parse(argc, argv)
+    
+    std::string metal_fraction_scheme, isotopic_percentage_scheme;
+    double initial_z, initial_y;
+
+    // the following four should be user input
+    // initial_y can be optional
+    initial_z = 0.02;
+    initial_y = 0.24 + 2*initial_z;
+    metal_fraction_scheme = "AG89";
+    isotopic_percentage_scheme = "L03_data";
+
+    fourdst::composition::io::ChemicalFileParser parser;
+    fourdst::composition::Composition comp;
+    comp = fourdst::composition::get_composition_record(metal_fraction_scheme, isotopic_percentage_scheme, initial_z, initial_y);
+    std::cout << comp << std::endl;
+
+}