Music pull request feedback

[vlachvojta]

@vlachvojta :

• Layout_parser: Line categories (LINE_CATEGORIES)
• Layout_parser: Filter output categories (CATEGORIES)
• decoder filter categories
• music_dictionary -> output_substitution_table (change order of key, value)
• Add minimalistic CLI for export music to user_scripts
• Render with categories box (just name of category)
• Normalize category names in render using code from pero/unicode_normalization
• OCR Engine get line confidence
• Test new YOLO model
• Check all changed logging statements
• Test OCR with old configs
• check backward compatibility of custom tag in page-xml
• Add Atomic option to output substitution + add setting options to config

@vlachvojta with @ikiss-fit :

• Check API and web compatibility (after adding line confidence in the OCR engine)