### What problem does this PR solve?
huqie.txt and huqie.txt.trie are put to infinity-sdk in
https://github.com/infiniflow/infinity/pull/3127.
Remove huqie.txt from ragflow and bump infinity to 0.6.10 in this PR.
### Type of change
- [x] Refactoring
### What problem does this PR solve?
- Original rag/nlp/rag_tokenizer.py is put to Infinity and infinity-sdk
via https://github.com/infiniflow/infinity/pull/3117 .
Import rag_tokenizer from infinity and inherit from
rag_tokenizer.RagTokenizer in new rag/nlp/rag_tokenizer.py.
- Bump infinity to 0.6.8
### Type of change
- [x] Refactoring
### What problem does this PR solve?
Bump to infinity v0.6.0-dev4.
WARNNING: infinity v0.6.0-dev4 has very different meta data format with
older versions. You have to destroy infinity data volume are restart
infinity container if there's existing data.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Added an infinity configuration file to easily customize the settings of
Infinity
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
