feat: set chunk to available state and select all chunk (#57)

feat: confirm before deleting knowledge base and add ChunkToolBar (#56)

feat: save the selected parser to the backend on the upload file page and upload document (#54)

feat: modify routing to nested mode and rename document (#52)

feat: Modify the color of the svg icon in the header according to the selected state and feat: extract routing information from the knowledge base into constants (#51)

feat: remove loading from model and use DvaModel instead of redundant types such as kAModelType (#47)

feat: prevent the user from entering the knowledge base if he is not logged in (#45)

set port (#39)

update knowledge_kb (#34)

add front end code (#27)