Improve item name presentation in translation comments

[BrettDong]

Summary

I18N "Improve item name presentation in translation comments"

Purpose of change

Some item names are displayed as a JSON object in translation comments:

#. ~ Description for {'str_sp': 'garnet and gold cufflinks'}
#. ~ Description for {'str_sp': 'garnet and silver cufflinks'}
#. ~ Description for {'str_sp': 'garnet and platinum cufflinks'}
#: lang/json/ARMOR_from_json.py
msgid "A pair of cufflinks with inset garnets."
msgstr ""

This is more desirable:

#. ~ Description for garnet and gold cufflinks
#. ~ Description for garnet and silver cufflinks
#. ~ Description for garnet and platinum cufflinks
#: lang/json/ARMOR_from_json.py
msgid "A pair of cufflinks with inset garnets."
msgstr ""

Describe the solution

• Create a helper function get_singular_name to extract singular name string from either name JSON object or string
• Use return value from get_singular_name() for translation comments

Describe alternatives you've considered

Testing

Run ./lang/update_pot.sh. JSON objects are gone from translation comments in the new generated translation template.

Additional context