Adds Finnish translation

[mrauha]

Native speaker here, this is good

[phelmig]

Hi @tirri, @mrauha Thanks a lot for your contribution. Can you please check the two existing Finnish translations and coordinate with the other contributors in order to create one inhibits the best of all three translations? https://github.com/flore2003/staythefuckhome/pulls?q=is%3Apr+Finnish

[tirri]

See https://github.com/flore2003/staythefuckhome/pull/65 and https://github.com/flore2003/staythefuckhome/pull/113

[phelmig]

Thank you all for your efforts. Please comment here with your name if I should add you to the list of contributors: https://github.com/flore2003/staythefuckhome/pull/65