feat(l10n): add pt_br localization #103

Job	Run time
Test Briefcase build (macos-12)	1m 41s
Test Briefcase build (windows-2022)	1m 37s
Test Briefcase build (ubuntu-22.04)	1m 43s
Test Python package build (macos-12)	36s
Test documentation build	56s
Lint & Test (macos-12)	1m 40s
Test Python package build (windows-2022)	58s
Lint & Test (windows-2022)	1m 29s
Test Python package build (ubuntu-22.04)	17s
CodeQL (javascript)	1m 17s
Lint & Test (ubuntu-22.04)	1m 35s
CodeQL (python)	1m 40s
Deploy github pages	1s
Upload coverage	1s
Briefcase build & draft release	1s
Publish to PyPi	1s
	15m 33s

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