Add "Clone As" to repositories and generate full clone commands in UI
- Add a configurable name for the clone-as directory, so you can have "Bits & Pieces" clone as "bits~n~pieces/" or simliar.
- By default, use "reasonable" heruistics to choose such a name.
- Generate a copy/pasteable clone commmand with this directory name.
Test Plan: Looked at some repositories.
Reviewers: btrahan, chad
Reviewed By: chad
Maniphest Tasks: T4175
Differential Revision: https://secure.phabricator.com/D8097