Use Pubky 0.10 grant auth bindings

[pwltr]

Summary

• Updates Pubky Ring to consume the Pubky 0.10 Grant-auth bindings from @synonymdev/react-native-pubky@0.14.0
• Migrates persisted Ring session state from session_secret to grant_secret with a breaking Redux persist migration that drops old sessions
• Passes PUBKY_RING_CLIENT_ID into signup/signin so Ring uses the Grant-auth default APIs
• Keeps standalone invite codes from being parsed as Pubky auth URLs before invite parsing
• Updates Jest mocks so the GitHub dependency branch can be used before the npm package is published

Dependency chain

• Depends on pubky-core-ffi PR: feat: upgrade pubky bindings to 0.10 pubky-core-ffi#27
• Depends on react-native-pubky PR: feat: upgrade pubky native bindings to 0.10 react-native-pubky#39
• The current dependency points at github:pubky/react-native-pubky#feat/upgrade-pubky-core-ffi for review. After @synonymdev/react-native-pubky@0.14.0 is published, this should be switched to the npm version before merge.

Verification

• yarn typecheck
• yarn test __tests__/inputParser.test.ts --runInBand
• yarn test __tests__/signupAction.test.ts --runInBand
• yarn test __tests__/inputRouter.test.ts --runInBand
• yarn test --runInBand