[lib/web] add test button to create initial peer list
Summary:
Before Identity launch, there isn't make any sense to run this migration, right now adding this only for testing purposes but the code can be reused.
Depends on D11841
Test Plan:
- Test is store was properly populated
- Test is persisting works
Reviewers: tomek, bartek
Reviewed By: bartek
Subscribers: ashoat
Differential Revision: https://phab.comm.dev/D11842