* Fix ipex auto importer with Python builtins.
* Raise errors if the user imports ipex manually before importing ipex_llm. Do nothing if they import ipex after importing ipex_llm.
* Remove import ipex in examples.
* add Qwen1.5-7B-Chat
* modify Qwen1.5 example
* update README
* update prompt format
* update folder name and example README
* add Chinese prompt sample output
* update link in README
* correct the link
* update transformer version