Improved Chat Experience

New additions and improvements:

1. **Email authentication (still WIP) - **will be merged soon. Request Link.
2. Improved the personas picker in the chat - now you can see the persona's name and description, and your selection is saved locally (unless you have a defaut persona).
3. Better bios - Made greeting & bio up to 512 chars long. Request Link
4. Character pages - When clicking on a character, it opens the character page, and doesn't start a conversation right away. Request Link
5. Greeting now takes dynamic parameters - You can now refer to the users name by using the {{name}} placeholder in the greeting. If you have a default persona set up, it will use its name and not your user name. Request Link

Bug fixes and improvements:

1. You can no longer send an empty message in the chat.
2. Improved chat speed and removed animations that weren't working well on mobile.
3. Made the chat input a bit smaller to allow more room to the messages themselves.
4. Fixed the placeholders in the create character form to be more descriptive and clear. Request Link