### What problem does this PR solve?

Supports jsonl or ldjson format. Feature request from
[discussion](https://github.com/orgs/infiniflow/discussions/8774).

### Type of change

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

### 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 json file parsing

### Type of change

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

---------

Signed-off-by: jinhai <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?

Close issue: #3828

### Type of change

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

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

### What problem does this PR solve?

Introduced [beartype](https://github.com/beartype/beartype) for runtime
type-checking.

### Type of change

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

### What problem does this PR solve?

feat: support json file.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)

---------

Co-authored-by: KevinHuSh <kevinhu.sh@gmail.com>