New diffPeakAnalysis app

[mariaderrico]

Create a new app in ezRun which generate an HTML report using:

• template: DifferentialPeakAnalysisReport.html
• input: grandchild_dataset.tsv file from NfCoreAtacSeq app
• refactor code available in NfCoreAtacSeq

Data to be use for testing: https://fgcz-sushi.uzh.ch/data_set/p36614/107462
available in gstore at /srv/gstore/projects/p34453/o39541_NfCoreAtacSeq_2025-11-27--18-44-31/.