Allow manual installation of apps by npm package name

[bnjbvr]

The manual installation allows you to enter a Github URL and then retrieves information from this package, shows them to the user and allows installation on the cozy. It would be neat to be able to do the same with apps packaged as npm packages (as in, using the newer package field in the cozy-registry descriptor). This would in particular allow testing external apps for the new npm packaging method.

I don't have any specific idea for the UI:

• reusing the same text input seems undesirable (we could have the URL bar consider the name is a package name if it doesn't start with https?, but that would be confusing in case of misspells).
• adding a new text input below the URL bar would make the UI a bit heavy
• perhaps tabs?

Crafting the app manifest from the npm package name shouldn't be too hard; I don't know how to retrieve app metadata (description and permission) in that case, though.

[nono]

Thanks for the suggestion!

I don't know how to retrieve app metadata (description and permission) in that case, though.

We already do that -> https://github.com/cozy/cozy-home/blob/master/server/lib/manifest.coffee#L85-L98