Summary: Added basic sublime-project file. We can add ignore paths in it later as needed.

Test Plan: Open using sublime.

Reviewers: kgandhi, michelle

Reviewed By: michelle

Differential Revision: https://phab.corp.pixielabs.ai/D17

GitOrigin-RevId: 18bea3f0363be1d13c38ba36df537c91f4876e0d