Yarn workspaces

Summary:
1) moved "sonar/desktop/src" to "sonar/desktop/app/src", so "app" is now a separate package containing the core Flipper app code
2) Configured yarn workspaces with the root in "sonar/desktop": app, static, pkg, doctor, headless-tests. Plugins are not included for now, I plan to do this later.

Reviewed By: jknoxville

Differential Revision: D20535782

fbshipit-source-id: 600b2301960f37c7d72166e0d04eba462bec9fc1

desktop/pkg/src/transforms/dynamic-requires.js

@@ -16,7 +16,7 @@ function isDynamicRequire(node) {
   );
 }
 
-module.exports = function(babel) {
+module.exports = function(babel, state) {
   const t = babel.types;
 
   return {
@@ -27,7 +27,11 @@ module.exports = function(babel) {
           return;
         }
 
-        path.replaceWith(t.identifier('triggerDynamicRequireError'));
+        path.replaceWith(
+          t.identifier(
+            'triggerDynamicRequireError_' + state.file.opts.filename,
+          ),
+        );
       },
     },
   };