* Fix navigation bar to 1
* Remove unnecessary python api
* Fixed failed langchain native api doc
* Change index page layout
* Update quicklink for IPEX-LLM
* Simplify toc and add bigdl-llm migration guide
* Update readthedocs readme
* Add missing index link for bigdl-llm migration guide
* Update logo image and repo link
* Update copyright
* Small fix
* Update copyright
* Update top nav bar
* Small fix
* Refactor readthedocs yml file to wget requirements-doc.txt for safety purposes
* Remove requirements-doc.txt from BigDL repo
* temp readme
* Remove requirements-rtd.txt and update README for local doc build
* Small typo fix
* Update requirements-rtd.txt for local build consistent with readthedocs deployment
* Update doc readme for local building
* Small revision
* Small typo fixes