Add txt2json script for calibration parameters

Add txt2json.py script to convert txt files with calibration parameters to JSON format.

I also put some JSON files in HGCalCommissioning/LocalCalibration/data that can be used as defaults with the tester for calibration ESProducer: https://github.com/CMS-HGCAL/cmssw/tree/dev/hackathon_base_CMSSW_14_1_0_pre0/RecoLocalCalo/HGCalRecAlgos/plugins/alpaka https://github.com/CMS-HGCAL/cmssw/blob/dev/hackathon_base_CMSSW_14_1_0_pre0/RecoLocalCalo/HGCalRecAlgos/test/testHGCalRecHitESProducer_cfg.py