v0.12.0 (#16986)

.github/workflows/coverage.yml

.github/workflows/unit_test.yml

CHANGELOG.md

docs/docs/CHANGELOG.md

docs/docs/api_reference/multi_modal_llms/nvidia.md

docs/mkdocs.yml

llama-index-cli/pyproject.toml

llama-index-core/llama_index/core/__init__.py

llama-index-core/pyproject.toml

llama-index-experimental/pyproject.toml

llama-index-finetuning/pyproject.toml

...x-integrations/agent/llama-index-agent-coa/pyproject.toml

...grations/agent/llama-index-agent-dashscope/pyproject.toml

...ions/agent/llama-index-agent-introspective/pyproject.toml

...-integrations/agent/llama-index-agent-lats/pyproject.toml

...tions/agent/llama-index-agent-llm-compiler/pyproject.toml

...ions/agent/llama-index-agent-openai-legacy/pyproject.toml

...ntegrations/agent/llama-index-agent-openai/pyproject.toml

...s/callbacks/llama-index-callbacks-agentops/pyproject.toml

...ations/callbacks/llama-index-callbacks-aim/pyproject.toml