### What problem does this PR solve?

Enhance capability of `list_kbs`.

Breaking change: change method from `GET` to `POST`.

### Type of change

- [x] Refactoring
- [x] Enhancement with breaking change

### What problem does this PR solve?

Fixes #5923 

Fixes the readonly variables from payload at
 /datasets/<dataset_id> 

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

Now if user tries to modify readonly values then it will show " The
input parameters are invalid. "

invalid_keys = {"id", "embd_id", "chunk_num", "doc_num", "parser_id",
"create_date", "create_time", "created_by",
"status","token_num","update_date","update_time"}
    if any(key in req for key in invalid_keys):
return get_error_data_result(message="The input parameters are
invalid.")
i have include those readonly keys in invalid_keys

### Type of change

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

---------

Co-authored-by: Raghav <2020csb1115@iitrpr.ac.in>

### What problem does this PR solve?

Add license statement.

### Type of change

- [x] Refactoring

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

### What problem does this PR solve?

Fix errors detected by Ruff

### Type of change

- [x] Refactoring

### What problem does this PR solve?

1. Failed update dataset case
2. Upload and parse text file

### Type of change

- [x] Other (please describe): test cases

---------

Signed-off-by: jinhai <haijin.chn@gmail.com>

### What problem does this PR solve?

1. Test not allowed fields of dataset

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] Other (please describe): Test cases

Signed-off-by: jinhai <haijin.chn@gmail.com>

### What problem does this PR solve?



### Type of change

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

---------

Co-authored-by: Jin Hai <haijin.chn@gmail.com>

### What problem does this PR solve?

Fix test cases

### Type of change

- [x] Other (please describe): Fix error cases

---------

Signed-off-by: jinhai <haijin.chn@gmail.com>

### What problem does this PR solve?

Test cases about dataset

### Type of change

- [x] Other (please describe): test cases

---------

Signed-off-by: jinhai <haijin.chn@gmail.com>

### What problem does this PR solve?

Feat: Scrolling knowledge base list and set the number of entries per
page to 30 #3695

### Type of change


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

### What problem does this PR solve?

1. Read KB list path parameter, page_number and page_size, which type
isn't int
2. Add cases on create / list / delete datasets.

### Type of change

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

Signed-off-by: jinhai <haijin.chn@gmail.com>

### What problem does this PR solve?

Add tests for frontend API

### Type of change

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

---------

Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>