Consolidate duplicated domain types into packages/integration-client

[bridgetthnkechi87-cloud]

Closes #291

Summary

• Removed duplicate Pass, Guild, and Member interface definitions from apps/dashboard/lib/mock-data.ts
• Reused the shared domain types exported by @guildpass/integration-client
• Re-exported those types from mock-data.ts so existing dashboard imports continue working
• Added README documentation for shared domain type exports
• Fixed invalid ignoreDeprecations values in affected TypeScript configs so typecheck can run with the installed TypeScript version

Testing

• pnpm --filter @guildpass/integration-client typecheck
• pnpm --filter @guildpass/dashboard typecheck

Note

• pnpm -r typecheck is currently blocked by an unrelated existing apps/access-api error: Cannot find module '@guildpass/contracts'.