[WIP] Add pt-br translation

[aniav]

@jessicamorim42 this seems to be not translated. Is this a crowdin export of some kind?

[jessicapaz]

I started translating the summary so I could translate the rest of the translation with other people

[aniav]

@jessicapaz I will close that for now, but you can totally reopen the pull request whenever you have made progress on that :)

[emmenezes]

@jessicapaz Hello, Jessica, do you still have an interest in translating to pt-br? I would like to help