* docs: fix typos
* typos: fix typos found by `codespell` across the codebase
* docs: fix `macOS` spelling
* docs: fix `authentification` terminology
"Authentification" is not a thing.
* docs: fix `localhost` typo in example link
* typos: fix in-code typos
These are potentially higher risk, but no other mentions of these typos
show up in the codebase.