refill the multipart form data at harbor API layer
export write error functions from the chartserver package
refactor the error format to be compatiable with push plugin
getting chart list returns chart list instead of map and provides total versions info
getting chart details will return dependencies and values besides the metatdata of the chart version
add chartserver directory to put chart server code
add controller to coordinate the flow
add base/repo/manipulation handlers to handle requests
add operator to parse more details of chart version
call dep ensure
