feat: server task handlers, email

Makefile

app/Template/StaticPageLayout/Turbo.php

composer.json

composer.lock

config.ini.example

docs/pages/index.md

resources/images/ogimage.webp

src/Attribute/HandlesServerPipeMessage.php

src/Attribute/HandlesServerTask.php

src/Attribute/RespondsToHttp.php

src/Attribute/WantsFeature.php

src/Command/Serve.php

src/CommandLoader.php

src/DependencyInjectionContainer.php

src/Feature.php

src/MailerConfiguration.php

src/ServerPipeMessage/CloseWebSocketConnection.php

src/ServerPipeMessageDispatcher.php

src/ServerTaskHandler.php

src/ServerTaskHandler/SendsEmailMessage.php