chore: sqlite-vss draft

docs/pages/docs/features/vector-store/index.md

docs/pages/docs/features/vector-store/sqlite-vss/index.md

resources/css/docs-page-homepage.css

src/Command/StaticPagesMakeEmbeddings.php

src/LlamaCppEmbeddingRequest.php

src/LlmPromptTemplate.php

src/LlmPromptTemplate/MistralInstructChat.php

src/LlmPromptTemplate/Phi2Question.php

src/LlmPromptTemplate/Plain.php

src/SQLiteVSSConfiguration.php

src/SQLiteVSSConnectionBuilder.php

.../ConfigurationProvider/SQLiteVSSConfigurationProvider.php