feat(l10n): add pt_br localization #106

Job	Run time
Test Briefcase build (macos-12)	6m 51s
Test documentation build	42s
Test Briefcase build (windows-2022)	5m 58s
CodeQL (javascript)	1m 20s
Test Briefcase build (ubuntu-22.04)	3m 15s
CodeQL (python)	2m 14s
Lint & Test (macos-12)	3m 0s
Lint & Test (windows-2022)	4m 16s
Lint & Test (ubuntu-22.04)	2m 2s
Test Python package build (macos-12)	28s
Test Python package build (windows-2022)	58s
Test Python package build (ubuntu-22.04)	17s
Upload coverage	5s
Deploy github pages	0s
Briefcase build & draft release	0s
Publish to PyPi	0s
	31m 26s

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