feat(python/const): added constants bindings

constants module can now be fully accessed from python

src/python/const/bindings.cpp

@@ -0,0 +1,39 @@
+#include <pybind11/pybind11.h>
+#include <pybind11/stl.h> // Needed for vectors, maps, sets, strings
+#include <pybind11/stl_bind.h> // Needed for binding std::vector, std::map etc if needed directly
+
+#include <string>
+#include "const.h"
+#include "bindings.h"
+
+namespace py = pybind11;
+
+
+void register_const_bindings(pybind11::module &const_submodule) {
+    py::class_<Constant>(const_submodule, "Constant")
+        .def_readonly("name", &Constant::name)
+        .def_readonly("value", &Constant::value)
+        .def_readonly("uncertainty", &Constant::uncertainty)
+        .def_readonly("unit", &Constant::unit)
+        .def_readonly("reference", &Constant::reference)
+        .def("__repr__", [](const Constant &c) {
+            return "<Constant(name='" + c.name + "', value=" + std::to_string(c.value) +
+                   ", uncertainty=" + std::to_string(c.uncertainty) +
+                   ", unit='" + c.unit + "')>";
+        });
+
+    py::class_<Constants>(const_submodule, "Constants")
+        .def_property_readonly("loaded", &Constants::isLoaded)
+        .def("get", &Constants::get, py::arg("name"), "Get a constant by name. Returns None if not found.")
+        .def("__getitem__", &Constants::get, py::arg("name"))
+        .def("has", &Constants::has, py::arg("name"), "Check if a constant exists by name.")
+        .def("keys", &Constants::keys, "Get a list of all constant names.")
+        .def(py::init([]() {
+            return &Constants::getInstance();
+            }),
+            // Tell pybind11 Python doesn't own this memory.
+            py::return_value_policy::reference,
+            "Get the singleton instance of Constants."
+        );
+
+}

src/python/const/bindings.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#include <pybind11/pybind11.h>
+
+void register_const_bindings(pybind11::module &const_submodule);

src/python/const/meson.build

@@ -0,0 +1,17 @@
+# Define the library
+bindings_sources = files('bindings.cpp')
+bindings_headers = files('bindings.h')
+
+dependencies = [
+    const_dep,
+    python3_dep,
+    pybind11_dep,
+]
+
+shared_module('py_const',
+    bindings_sources,
+    include_directories: include_directories('.'),
+    cpp_args: ['-fvisibility=default'],
+    install : true,
+    dependencies: dependencies,
+)