Translation manager update

[wbazant]

Part of #538.

Fyi @mpastoring I've changed our script a bit while writing up instructions for translation issues. If you have ideas for the process or would be up for translating some of the pages, please feel free!

[wbazant]

These were the AI instructions to change the script:

history | grep aider | grep trans
  627  ,,aider scripts/translation_manager.py -m "Fix this error that happens for parser.print_help(): ValueError: unsupported format character '{' (0x7b) at index 9"
  630  ,,aider scripts/translation_manager.py -m "Add option --list-in-component that just needs component path, and lists all the keys in the file"
  633  ,,aider scripts/translation_manager.py -m "When doing --list-in-component, cope with json path not being provided " # that just needs component path, and lists all the keys in the file"
  650  ,,aider scripts/translation_manager.py -m "Do not create any new locale files when doing --migrate"
  654  ,,aider scripts/translation_manager.py -m "When logging for --migrate, print the yaml and json file with -> in between"
  656  ,,aider scripts/translation_manager.py -m "When logging for --migrate and file doesn't exist, print the expected path"
  662  ,,aider scripts/translation_manager.py -m "For --migrate, count added and edited keys and log them"
  671  ,,aider scripts/translation_manager.py -m "Remove --remove-params and --replace-placeholders as separate options. Instead, always do these operations for the migrated keys when migrating"