Removes command_line from core (#10772)

CHANGELOG.md

CONTRIBUTING.md

llama-index-cli/CHANGELOG.MD

llama-index-cli/llama_index/cli/rag/base.py

llama-index-cli/pyproject.toml

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

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

...-index-core/llama_index/core/command_line/command_line.py

...ndex-core/llama_index/core/command_line/new_package/BUILD

...ore/llama_index/core/command_line/new_package/__init__.py

...ex-core/llama_index/core/command_line/new_package/base.py

...ama_index/core/command_line/new_package/common/.gitignore

...llama_index/core/command_line/new_package/common/Makefile

...llama_index/core/command_line/new_package/templates/BUILD

...index/core/command_line/new_package/templates/__init__.py

...ama_index/core/command_line/new_package/templates/init.py

...ndex/core/command_line/new_package/templates/pyproject.py

...a_index/core/command_line/new_package/templates/readme.py

llama-index-core/llama_index/core/command_line/rag.py

llama-index-core/pyproject.toml