docs: fix spelling issues

README.md

docs/developer-guide.md

run.py

src/base/exceptions.py

src/base/utils.py

src/client/connector.py

src/control.py

src/engine.py

src/events.py

src/plugins/trackservice.py

src/resources.py

src/scheduling/api.py

src/scheduling/models.py

src/scheduling/utils.py