Migrate lint/format tooling to Ruff, update CI matrix, and stabilize cross-platform/firefox tests#1978

emanlove merged 27 commits into

robotframework:masterrobotframework/SeleniumLibrary:masterfrom

yuriverweij:fix/update-linting-checking-and-formattingyuriverweij/SeleniumLibrary:fix/update-linting-checking-and-formattingCopy head branch name to clipboard