Draft: Add sphinx documentation

The mechanism for building docs was copied from EveryBeam; it parses both Doxygen documentation and python documentation into a sphinx page.

python/pysettings.cc

@@ -197,11 +197,15 @@ void init_settings(py::module& m) {
       .def_readwrite("image", &radler::Settings::LocalRms::image,
                      DOC(radler_Settings_LocalRms_image));
 
-  py::class_<radler::Settings::SpectralFitting>(settings, "SpectralFitting", DOC(radler_Settings_SpectralFitting))
-      .def_readwrite("mode", &radler::Settings::SpectralFitting::mode, DOC(radler_Settings_SpectralFitting_mode))
-      .def_readwrite("terms", &radler::Settings::SpectralFitting::terms, DOC(radler_Settings_SpectralFitting_terms))
+  py::class_<radler::Settings::SpectralFitting>(
+      settings, "SpectralFitting", DOC(radler_Settings_SpectralFitting))
+      .def_readwrite("mode", &radler::Settings::SpectralFitting::mode,
+                     DOC(radler_Settings_SpectralFitting_mode))
+      .def_readwrite("terms", &radler::Settings::SpectralFitting::terms,
+                     DOC(radler_Settings_SpectralFitting_terms))
       .def_readwrite("forced_filename",
-                     &radler::Settings::SpectralFitting::forced_filename, DOC(radler_Settings_SpectralFitting_forced_filename));
+                     &radler::Settings::SpectralFitting::forced_filename,
+                     DOC(radler_Settings_SpectralFitting_forced_filename));
 
   py::enum_<aocommon::Polarization::PolarizationEnum>(
       m, "Polarization",
@@ -219,10 +223,12 @@ void init_settings(py::module& m) {
       .value("yx", aocommon::PolarizationEnum::YX)
       .value("yy", aocommon::PolarizationEnum::YY)
       .value("full_stokes", aocommon::PolarizationEnum::FullStokes,
-		      DOC(aocommon_Polarization_PolarizationEnum_FullStokes))
-      .value("instrumental", aocommon::PolarizationEnum::Instrumental, DOC(aocommon_Polarization_PolarizationEnum_Instrumental))
+             DOC(aocommon_Polarization_PolarizationEnum_FullStokes))
+      .value("instrumental", aocommon::PolarizationEnum::Instrumental,
+             DOC(aocommon_Polarization_PolarizationEnum_Instrumental))
       .value("diagonal_instrumental",
-             aocommon::PolarizationEnum::DiagonalInstrumental, DOC(aocommon_Polarization_PolarizationEnum_DiagonalInstrumental))
+             aocommon::PolarizationEnum::DiagonalInstrumental,
+             DOC(aocommon_Polarization_PolarizationEnum_DiagonalInstrumental))
       // PolarizationEnum is an unscoped enum, hence export_values(). See
       // https://pybind11.readthedocs.io/en/stable/classes.html?highlight=export_values#enumerations-and-internal-types.
       .export_values();