feat: migrate legacy docs (#1568)

...index/modules/documents_and_nodes/metadata_extraction.mdx

...dex/modules/embeddings/available_embeddings/deepinfra.mdx

...aindex/modules/embeddings/available_embeddings/gemini.mdx

...x/modules/embeddings/available_embeddings/huggingface.mdx

...aindex/modules/embeddings/available_embeddings/jinaai.mdx

...index/modules/embeddings/available_embeddings/mistral.mdx

.../modules/embeddings/available_embeddings/mixedbreadai.mdx

...aindex/modules/embeddings/available_embeddings/ollama.mdx

...aindex/modules/embeddings/available_embeddings/openai.mdx

...ndex/modules/embeddings/available_embeddings/together.mdx

.../src/content/docs/llamaindex/modules/embeddings/index.mdx

.../src/content/docs/llamaindex/modules/evaluation/index.mdx

...ocs/llamaindex/modules/evaluation/modules/correctness.mdx

...cs/llamaindex/modules/evaluation/modules/faithfulness.mdx

.../docs/llamaindex/modules/evaluation/modules/relevancy.mdx

...tent/docs/llamaindex/modules/ingestion_pipeline/index.mdx

...llamaindex/modules/ingestion_pipeline/transformations.mdx

apps/next/src/content/docs/llamaindex/modules/llamacloud.mdx

...docs/llamaindex/modules/llms/available_llms/anthropic.mdx

...ent/docs/llamaindex/modules/llms/available_llms/azure.mdx