feat: Allow for no-config adds

[ieedan]

This would allow you to add without a config file. Much nicer than erroring without a config file. Tests and diffs should still require one though.

Basically in the add command it would prompt you:

1. Would you like to add a config? Y/n (recommended)
-- yes path --
run `init`
-- no path --
wait until after blocks are selected
where would you like to add the blocks? 
src/blocks
would you like to include tests? y/N

I think this would be nice if a library wanted to just tell their users to install their components by saying:

npx jsrepo add github/ieedan/std/utilities/math

[ieedan]

A little better planning for this one...

I think users not using a config should be prompted by the cli when running add along the lines of:

You don't have jsrepo initialized in your project. Do you want to continue? 
y/N

after: After the user has chosen the blocks they want to install

if: Y
Where would you like to install the blocks?
<path>

if: any of the blocks have tests
Include tests?
y/N

Add a watermark?
Y/n