Add put manifests command

[mjpitz]

This is the last half of the indexing flow. The idea is to be able to chain this command with the extract command to be able to manually index a project.

Basic Usage:

deps extract manifests -d . | deps put manifests -f -

Alternatively, people can write the extracted contents using some other tool and then read them off disk.

comp-internal-proc > deps.json
deps put manifests -f deps.json

[abitrolly]

There is no deps extract command in 0.3.5 version, and it is not clear how it can be added, because extractors are JS.