Summary:
There's `settings sync` native stuff but for visual reference.
Also update `.gitattributes` and `.arclint` to ignore jsonc.
Signed-off-by: Yongmin Hong <revi@omglol.email>
Test Plan: Verify this is the same settings as vscode user settings.
Reviewers: O1 revi & automations, revi
Reviewed By: O1 revi & automations, revi
Differential Revision: https://issuetracker.revi.xyz/D381
