### What problem does this PR solve?

Add test for document

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

Co-authored-by: liuhua <[email protected]>
Co-authored-by: Kevin Hu <[email protected]>

### What problem does this PR solve?

_Choosing Laws Chunk Method results in an error when parsing a document.
The error is caused by a missing import in the `laws.py` file._

```
Traceback (most recent call last):
  File "/ragflow/rag/svr/task_executor.py", line 445, in handle_task
    do_handle_task(task)
  File "/ragflow/rag/svr/task_executor.py", line 384, in do_handle_task
    cks = build(r)
          ^^^^^^^^
  File "/ragflow/rag/svr/task_executor.py", line 196, in build
    cks = chunker.chunk(row["name"], binary=binary, from_page=row["from_page"],
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/ragflow/rag/app/laws.py", line 161, in chunk
    for txt, poss in pdf_parser(filename if not binary else binary,
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/ragflow/rag/app/laws.py", line 124, in __call__
    logging.debug("layouts:".format(
    ^^^^^^^
NameError: name 'logging' is not defined. Did you forget to import 'logging'

```

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [ ] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):

Co-authored-by: Michal Masrna <[email protected]>

### What problem does this PR solve?

1. Remove unused code
2. Fix type mismatch, in nlp search and infinity search interface
3. Fix chunk list, get all chunks of this user.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

---------

Signed-off-by: jinhai <[email protected]>

### What problem does this PR solve?

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)