* exclude xcworkspace that begins with a period

* fix if spacing, add comment

* add unit test for when no xcworkspace found

* update to use xcodeWorkspace, make it nullable and refactor

* check if hostAppRoot exists before trying to get xcworkspace

* use local variables to take advantage of type promotion

* only check if not null, don't need to check if exists

* readd exist check for migrate

* readd missing line at end of file