Fix various typos (#21103)
Found via `codespell -q 3 -S
./options/locale,./options/license,./public/vendor,./web_src/fomantic -L
actived,allways,attachements,ba,befores,commiter,pullrequest,pullrequests,readby,splitted,te,unknwon`
Co-authored-by: techknowlogick <techknowlogick@gitea.io>