Port Cypress specs to Playwright

[rudolfs]

• [x] shortcuts.spec.ts delete
• [x] attestation.spec.ts delete
• [x] search.spec.ts port
• [x] modal.spec.ts port
• [x] project/track.spec.ts merge it with search.test.ts (make sure the notification pops up)
• [x] project/patches.spec.ts port and rewrite to check replication between multiple peers and the patch feature
• [x] project/peer_management.spec.ts port
• [x] project/source_browsing.spec.ts port and rewrite to not use control endpoints in proxy
• [x] deep_linking.spec.ts merge with patch tests, requires IPC stubs
• [x] routing.spec.ts port, requires the IPC stubs
• [x] settings.spec.ts port, requires the IPC stubs

Once these are ported, we can get rid of Cypress and the http/control endpoints in proxy.