Add Brazilian Portuguese translation (#6199)

* Add Brazilian Portuguese translation

Co-authored-by: Leonardo Ferreira Fontenelle <leonardof@leonardof.med.br>
Co-authored-by: Ítalo Santos <ids37@nau.edu>

* mention pt_BR in CRAN_Release

* NEWS entry

---------

Co-authored-by: Leonardo Ferreira Fontenelle <leonardof@leonardof.med.br>
Co-authored-by: Ítalo Santos <ids37@nau.edu>
Co-authored-by: Michael Chirico <chiricom@google.com>

.dev/CRAN_Release.cmd

@@ -17,11 +17,12 @@ Rscript -e "tools::update_pkg_po('.')"
 
 # 2) Open a PR with the new templates & contact the translators
 #   * zh_CN: @hongyuanjia
+#   * pt_BR: @rffontenelle
 ## Translators to submit commits with translations to this PR
 ##   [or perhaps, if we get several languages, each to open
 ##    its own PR and merge to main translation PR]
 
-## 3) Check validity with tools::checkPoFiles("zh_CN")
+## 3) Check validity with tools::checkPoFiles(".*")
 
 ## 4) Compile the new .mo binary files with potools::po_compile()
 

NEWS.md

@@ -122,6 +122,8 @@
 
 1. Fix a typo in a Mandarin translation of an error message that was hiding the actual error message, [#6172](https://github.com/Rdatatable/data.table/issues/6172). Thanks @trafficfan for the report and @MichaelChirico for the fix.
 
+2. data.table is now translated into Brazilian Portugese (`pt_BR`) as well as Mandarin (`zh_CN`). Thanks to the [new translation team](https://github.com/orgs/Rdatatable/teams/brazil) consisting initially of @rffontenelle, @leofontenelle, and @italo-07. The team is open if you'd also like to join and support maintenance of these translations.
+
 # data.table [v1.15.4](https://github.com/Rdatatable/data.table/milestone/33) (27 March 2024)
 
 ## BUG FIXES