CLI: bootstrapper

[Ivshti]

stremio-addon-sdk new should bootstrap a new addon

other commands:

• validate: checks if the addon is behaving correctly by requesting the manifest and a few simple resources
• replicate: can be used to replicate to a directory or to IPFS, or to fuzz/lint the addon
• deploy: deploys to nowsh/lambda, tests if the addon is available (by running basic detectFromURL and checking a few resource paths), publishes to stremio central

the replicator being built in is fantastic, since replicating an addon is a combo of fuzzing, linting and replicating
validate/replicate can use the same code (the replicator), but configured differently
see https://github.com/Stremio/labs/issues/14

The CLI should be usable both in stremio addon projects (in the directory), and for addons that are not using the SDK (e.g. implemented in Go)

[shteryana]

Bootstrapper is now completed

Replicator handled in a separate issue - #69