Summary: `~` is not supported by node's `fs` functions. So we are replacing it manually.
Reviewed By: priteshrnandgaonkar
Differential Revision: D8658889
fbshipit-source-id: 36c9885a00a7e07e54ab416d6fda3b29bbda73b6
Summary:
There are 3 sources where plugins can be loaded from:
* `src/plugins`
* `src/fb/plugins`
* any path specified in `~/.sonar/config.json`
Plugins found in the first two directories are bundled with the app when building.
Reviewed By: jknoxville
Differential Revision: D8636061
fbshipit-source-id: 2064090d43d11695ffd99df195e5b594559fe087
