Chat ScrollState Improvements & Chat Bug Fixes

[Taewan-P]

• Scroll to the bottom when question is asked or answer is done loading.
  • However, scroll sticking to the bottom when answer is generating is not implemented.
• Sync scroll states (When answer is generated / answer is generating)
  • Previously, this did not sync because ScrollState is Initialized again when idle mode is switched (see 909ee7d13a95b42fc8e71210ded61413f859a818)
• Fixed critical error about message saving & orders
  • When regenerating answers, the message id was not synced with the saved data in the database.
  • Also there were cases when message id is saved as duplicate (This will just overwrite it and make groupedMessages weird)
  • Timestamp was not updating correctly, making another bug

[github-actions[bot]]

Build complete! Here's the debug APK: https://github.com/Taewan-P/gpt_mobile/actions/runs/9682394231/artifacts/1640972096