chore: document dialogue nodes

docs/pages/docs/changelog/index.md

.../features/ai/server/llama-cpp/extractors/subject/index.md

...ocs/features/ai/server/llama-cpp/extractors/when/index.md

...ures/ai/server/llama-cpp/extractors/yes-no-maybe/index.md

...tures/conversational-applications/dialogue-nodes/index.md

.../pages/docs/features/conversational-applications/index.md

docs/pages/index.md

resources/css/docs-page-homepage.css

src/DialogueResponse/LiteralInputResponse.php