feat(KINSOL): Switch from Eigen to KINSOL

Previously QSE solving was done using Eigen. While this worked we were
limited in the ability to use previous iterations to speed up later
steps. We have switched to KINSOL, from SUNDIALS, for linear solving.
This has drastically speed up the process of solving for QSE abundances,
primarily because the jacobian matrix does not need to be generated
every single time time a QSE abundance is requested.

build-config/sundials/cvode/meson.build

@@ -0,0 +1,47 @@
+cmake = import('cmake')
+cvode_cmake_options = cmake.subproject_options()
+
+cvode_cmake_options.add_cmake_defines({
+    'CMAKE_CXX_FLAGS'   : '-Wno-deprecated-declarations',
+    'CMAKE_C_FLAGS'     : '-Wno-deprecated-declarations',
+    'BUILD_SHARED_LIBS' : 'ON',
+    'BUILD_STATIC_LIBS' : 'OFF',
+
+})
+
+cvode_cmake_options.add_cmake_defines({
+    'CMAKE_INSTALL_LIBDIR': get_option('libdir'),
+    'CMAKE_INSTALL_INCLUDEDIR': get_option('includedir')
+})
+
+cvode_sp = cmake.subproject(
+    'cvode',
+    options: cvode_cmake_options,
+)
+
+# For the core SUNDIALS library (SUNContext, etc.)
+sundials_core_dep = cvode_sp.dependency('sundials_core_shared')
+
+# For the CVODE integrator library
+sundials_cvode_dep = cvode_sp.dependency('sundials_cvode_shared')
+
+# For the serial NVector library
+sundials_nvecserial_dep = cvode_sp.dependency('sundials_nvecserial_shared')
+
+# For the dense matrix library
+sundials_sunmatrixdense_dep = cvode_sp.dependency('sundials_sunmatrixdense_shared')
+
+# For the dense linear solver library
+sundials_sunlinsoldense_dep = cvode_sp.dependency('sundials_sunlinsoldense_shared')
+
+cvode_dep = declare_dependency(
+    dependencies: [
+        sundials_core_dep,
+        sundials_cvode_dep,
+        sundials_nvecserial_dep,
+        sundials_sunmatrixdense_dep,
+        sundials_sunlinsoldense_dep,
+    ],
+)
+
+