Adding a few missing terms and translations in locale-pt-BR

[andreappel]

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Description

Added a few missing term translations, such as composer, interviewer, and performer.

Checklist

• Check that you're listed as a <translator> in the <info> block at the beginning of the file.
• Check that you've updated the date under <updated> in the <info> block. Be sure to preserve the original date-time formatting (for example, 2025-09-22T22:06:38+00:00)
• If possible, please include references to dictionaries, style guides, or similar that inform your translations (see the en_US locale for examples). This helps us to keep locales up to date over time.

[andreappel]

Fixed composer for the pt-PT version and added the Brazilian (pt-BR) version. Thanks!

[andreappel]

I've found a missing form and created a new commit, and can not find the resulting error.

[bwiernik]

@andreappel Thanks for the contribution! You added several translations for terms that are generally blank. This is because typically these are cited like an "author" for items and not specifically labeled when cited in that position. For example, most citation styles call for a composer to be cited without a label:

Example from APA style:

Picker, T., & McClatchy, J. D. (1995). Emmeline: An opera in two acts [Study score]. Schott Music.

If these translations are added to the main pt locale file, then these labels will appear across styles—I'm not sure that's the best option. Can you share some more context for these additions?

[andreappel]

Thanks, now I get it. ABNT often requires the labels, and the variable positioned in a place different than the author (firstly), with the title as the main entry. I've had some difficulties on the style with this earlier.