Extend CaloClusterResolution for NeutralPID with cluster categorization and shower shapes

Major enhancements:

• Add cluster categorization (Photons, pi0, Hadrons, PileUp)
• Implement complete shower shape variables (r2, r2r4, κ, asym)
• Extract 5×5 grid cell energies (ClE1-ClE25)
• Add robust E19/E49 calculations ...

@author Ali Bavarchee ali.bavarchee@cern.ch @date 2025-07-11