### What problem does this PR solve?
- Add multiple output format to ragflow_cli
- Initialize contextengine to Go module
- ls datasets/ls files
- cat file
- search -d dir -q query
issue: #13714
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Add command: logout
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
### What problem does this PR solve?
Implement Create/Drop Index/Metadata index in GO
New API handling in GO:
POST/kb/index
DELETE /kb/index
POST /tenant/doc_meta_index
DELETE /tenant/doc_meta_index
CREATE INDEX FOR DATASET 'dataset_name' VECTOR_SIZE 1024;
DROP INDEX FOR DATASET 'dataset_name';
CREATE INDEX DOC_META;
DROP INDEX DOC_META;
### Type of change
- [x] Refactoring
### What problem does this PR solve?
- GENERATE TOKENS OF USER 'xxx@xxx.com'
- DROP KEY 'ragflow-yyyyy' OF 'xxx@xxx.com'
- LIST KEYS OF 'xxx@xxx.com'
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
---------
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
