Simplify adding a source

[sayedihashimi]

The command to add a new source is

dotnet new3 source add <sourcename> <sourcepath>

I'm not sure what's the syntax for adding a NuGet package is currently here, but I'm guessing the following.

dotnet new3 source add <sourcename> <sourceversion>

From https://github.com/dotnet/cli/issues/2052, the proposal is

dotnet new --install <sourcename> <sourceversion>

In dotnet new3 the user has to remember two items source and add. Can we reduce to one single item, perhaps add or install.

[mlorbetske]

I like that, we can get rid of component too this way, one --install to rule them all

[mlorbetske]

Let's add --uninstall and something for listing what's installed too. We can use this to get rid of source and component commands, which will make help work better

[sayedihashimi]

Let's add --uninstall and something for listing what's installed too. We can use this to get rid of source and component commands, which will make help work better

Sounds good

[mlorbetske]

-i|--install, -u|--uninstall and -c|--current-config now work with either sources or components, no additional name parameters are required, multiple components or sources can be installed/uninstalled at once.