re #8130 #8135 #8142
re #7871 - connect templates with data from database
re #7782 Created new class ExporterPDF with export to PDF functionality and renamed the former Exporter class to ExporterXLSX, changed the version of a library used for export to XLSX functionality implementation
re #7781 Created package utils for utility classes and created class Exporter with export to xlsx functionality
re #7668 Project init with connecting to demo database