fix(weakRates): major progress in resolving bugs

bigs were introduced by the interface change from accepting raw molar abundance vectors to using the composition vector. This commit resolves many of these, including preformant ways to report that a species is not present in the composition and unified index lookups using composition object tooling.

BREAKING CHANGE:

src/lib/solver/strategies/CVODE_solver_strategy.cpp

@@ -393,8 +393,8 @@ namespace gridfire::solver {
 
     void CVODESolverStrategy::calculate_rhs(
         const sunrealtype t,
-        const N_Vector y,
-        const N_Vector ydot,
+        N_Vector y,
+        N_Vector ydot,
         const CVODEUserData *data
     ) const {
         const size_t numSpecies = m_engine.getNetworkSpecies().size();