Add Fireworks to LlamaIndex (#10959)

docs/examples/embeddings/fireworks.ipynb

docs/examples/llm/fireworks.ipynb

docs/module_guides/models/embeddings.md

docs/module_guides/models/llms/modules.md

...ns/embeddings/llama-index-embeddings-fireworks/.gitignore

...rations/embeddings/llama-index-embeddings-fireworks/BUILD

...ions/embeddings/llama-index-embeddings-fireworks/Makefile

...ons/embeddings/llama-index-embeddings-fireworks/README.md

...beddings-fireworks/llama_index/embeddings/fireworks/BUILD

...gs-fireworks/llama_index/embeddings/fireworks/__init__.py

...ddings-fireworks/llama_index/embeddings/fireworks/base.py

...dings-fireworks/llama_index/embeddings/fireworks/utils.py

...s/embeddings/llama-index-embeddings-fireworks/poetry.lock

...mbeddings/llama-index-embeddings-fireworks/pyproject.toml

...s/embeddings/llama-index-embeddings-fireworks/tests/BUILD

...ddings/llama-index-embeddings-fireworks/tests/__init__.py

...ex-embeddings-fireworks/tests/test_fireworks_embedding.py

...x-embeddings-openai/llama_index/embeddings/openai/base.py

...x-integrations/llms/llama-index-llms-fireworks/.gitignore

...-index-integrations/llms/llama-index-llms-fireworks/BUILD