feat: support ML models

docs/pages/docs/features/ai/machine-learning/index.md

docs/pages/docs/features/machine-learning/index.md

docs/pages/index.md

...torials/how-to-setup-postfix-for-outgoing-emails/index.md

examples/machine-learning/.gitignore

examples/machine-learning/README.md

examples/machine-learning/app/Command/TrainIris.php

examples/machine-learning/app/HttpResponder/Homepage.php

examples/machine-learning/app/HttpResponder/Predict.php

examples/machine-learning/app/HttpRouteSymbol.php

examples/machine-learning/composer.json

examples/machine-learning/composer.lock

examples/machine-learning/datasets/iris.ndjson

examples/machine-learning/models/.gitignore

resources/css/docs-page-homepage.css