Hello @mvorisek! I've made a tool for you.
https://github.com/szepeviktor/typos-on-you
It finds typos in any repository.

Output for atk4/data
https://github.com/szepeviktor/typos-on-you/actions/runs/5371072403/jobs/9743586984
Output for atk4/ui
https://github.com/szepeviktor/typos-on-you/actions/runs/5371108915 - generated files should be ignored

Would you like to receive a PR fixing these?