@fsgiudice Easiest way is to take a look on Github using browser. Example in your case: https://github.com/quasarframework/quasar/pull/315/files (Files tab shows all changes that are pushed for PR). Would be a rules of thumb to simply make another clone of Quasar each time you start something new OR roll back your own commits and sync to latest Quasar repo.
Btw, thank you so much for taking time for a PR. Really appreciate it!
@fsgiudice if you write components for Quasar you already have a playground app working there (/dev folder, which is run on npm run dev and compiles Quasar on the fly). Add a page for each new component and test it out there. No need to compile and then use in another repo.